M Tanaka

Kyushu University, Hukuoka, Fukuoka, Japan

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Publications (804)1891.69 Total impact

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    ABSTRACT: Muonic X-ray measurement by the use of cosmic muon has a potential to identify nuclear material in containers. We performed a feasibility study by using an iron target. Two plastic scintillators detected incoming cosmic-ray muons and a veto scintillator identified muons stopped in the target. Germanium detectors in coincidence with the scintillators measured muonic X-ray energies. We clearly observed muonic X-ray peaks in the photon spectrum, of which the energies were consistent with known muonic X-ray energies. By using the obtained spectrum, input parameters of the Monte-Carlo simulation were checked. The simulation for uranium target showed that this method is promising.
  • R. Nakane, S. Sugahara, M. Tanaka
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    ABSTRACT: We systematically investigate the structural and magnetic properties of ferromagnetic Fe1− x Si x (0.18 ≤ x ≤ 0.33) films formed by rapid thermal annealing (RTA) on silicon-on-insulator (SOI) substrates. During RTA of an Fe film deposited on a SOI substrate (consisting of a top Si layer, a buried oxide SiO2 layer, and a Si substrate), an Fe1− x Si x film is synthesized by the thermal reaction of the deposited Fe film and the top Si layer, but the reaction is limited by the buried oxide layer in the SOI substrate, thus the Si concentration x in Fe1− x Si x can be controlled by both the initial thicknesses of the Fe film and the top Si layer. A variety of characteristics show that single-phase Fe1− x Si x (x = 0.18, 0.22, and 0.25) films with D03 + B2 structure are successfully obtained by choosing the optimum annealing temperature and time. Furthermore, the ordering fraction of D03 and B2 structures in these films is found to be more than 87%, indicating that the crystalline quality of these films is comparable to that of bulk Fe1− x Si x materials reported so far. On the other hand, it is found that the Fe1− x Si x (x = 0.33) film has Fe3Si and FeSi phases as in the case of bulk Fe1− x Si x with x = 0.33. The film production technique and the quality of the ferromagnetic Fe1− x Si x presented in this study are very attractive and useful for silicon-based spintronic devices which are compatible with the complementary metal-oxide-semiconductor technology.
    Journal of Applied Physics 04/2015; 117(13):133906. DOI:10.1063/1.4915335 · 2.19 Impact Factor
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    ABSTRACT: Simultaneous pancreas-kidney transplantation (SPK) is a definitive treatment for type 1 diabetics with end-stage renal disease (ESRD). Because of the shortage of deceased donors in Japan, the mortality rate during the waiting period is high. We evaluated mortality risk in patients with type 1 diabetes waiting for SPK, and the benefit of living-donor kidney transplantation (LDK) preceding pancreas transplantation, which may reduce mortality in patients awaiting SPK. This retrospective study included 71 patients with type 1 diabetes. Twenty-six patients underwent SPK, 15 underwent LDK, and 30 were waiting for SPK. Their cumulative patient and graft survival rates were retrospectively evaluated. Risk factors contributing to mortality in patients with type 1 diabetes awaiting SPK were evaluated with the use of a Cox proportional hazards model. The 5-year cumulative patient survival rates in the SPK and LDK groups were 100% and 93.3%, respectively (P = .19), and 5-year kidney graft survival rates were 95.7% and 100% (P = .46), respectively. The cumulative survival rate in patients awaiting SPK was 77.7% at 5 years after registration. Duration of dialysis was the only factor significantly associated with patient and graft survivals according to both univariate and multivariate analyses. Patient and graft survival rates were similar in the SPK and LDK groups, but the survival rate of patients awaiting SPK decreased over time. Duration of dialysis was an independent risk factor for patient and graft survival. LDK preceding pancreas transplantation may be an effective therapeutic option for patients with type 1 diabetes and ESRD. Copyright © 2015 Elsevier Inc. All rights reserved.
    Transplantation Proceedings 04/2015; 47(3):733-7. DOI:10.1016/j.transproceed.2014.12.048 · 0.95 Impact Factor
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    ABSTRACT: Renal transplantation has been established as a treatment for end-stage renal disease (ESRD) due to diabetic nephropathy. However, few studies have focused on the outcome after renal transplantation in patients with ESRD and type 2 diabetic nephropathy. To investigate the effect of renal transplantation on ESRD with type 2 diabetic nephropathy, we retrospectively analyzed patients who received renal transplantation at our facility. This study aimed to compare the outcome of renal transplantation for type 2 diabetic nephropathy with that for nondiabetic nephropathy. We studied 290 adult patients, including 65 with type 2 diabetic nephropathy (DM group) and 225 with nondiabetic nephropathy (NDM group), who underwent living-donor renal transplantation at our facility from February 2008 to March 2013. We compared the 2 groups retrospectively. In the DM and NDM groups, the 5-year patient survival rates were 96.6% and 98.7%, and the 5-year graft survival rates were 96.8% and 98.0%, respectively, with no significant differences between the groups. There were no significant differences in the rates of surgical complications, rejection, and infection. The cumulative incidence of postoperative cardiovascular events was higher in the DM group than in the NDM group (8.5% vs 0.49% at 5 years; P = .002). Patient and graft survival rates after renal transplantation for type 2 diabetic nephropathy are not inferior to those for recipients without diabetic nephropathy. Considering the poor prognosis of patients with diabetic nephropathy on dialysis, renal transplantation can provide significant benefits for these patients. Copyright © 2015 Elsevier Inc. All rights reserved.
    Transplantation Proceedings 03/2015; DOI:10.1016/j.transproceed.2014.12.047 · 0.95 Impact Factor
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    ABSTRACT: Ultra-deep observations of ECDF-S with Chandra and XMM-Newton enable a search for extended X-ray emission down to an unprecedented flux of $2\times10^{-16}$ ergs s$^{-1}$ cm$^{-2}$. We present the search for the extended emission on spatial scales of 32$^{\prime\prime}$ in both Chandra and XMM data, covering 0.3 square degrees and model the extended emission on scales of arcminutes. We present a catalog of 46 spectroscopically identified groups, reaching a redshift of 1.6. We show that the statistical properties of ECDF-S, such as logN-logS and X-ray luminosity function are broadly consistent with LCDM, with the exception that dn/dz/d$\Omega$ test reveals that a redshift range of $0.2<z<0.5$ in ECDF-S is sparsely populated. The lack of nearby structure, however, makes studies of high-redshift groups particularly easier both in X-rays and lensing, due to a lower level of clustered foreground. We present one and two point statistics of the galaxy groups as well as weak-lensing analysis to show that the detected low-luminosity systems are indeed low-mass systems. We verify the applicability of the scaling relations between the X-ray luminosity and the total mass of the group, derived for the COSMOS survey to lower masses and higher redshifts probed by ECDF-S by means of stacked weak lensing and clustering analysis, constraining any possible departures to be within 30\% in mass. Abridged.
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    ABSTRACT: We herein present a novel technique for laparoscopic en bloc excision involving anteriorly extended intersphincteric resection with partial resection of the posterior lobe of the prostate for large rectal gastrointestinal stromal tumors (GISTs). The sequence of neoadjuvant imatinib therapy and this less invasive surgery for marginally resectable rectal GISTs has the potential to obviate the need for urinary reconstruction and permanent stomas without jeopardizing the tumor margin status.
    Techniques in Coloproctology 12/2014; DOI:10.1007/s10151-014-1261-6 · 1.34 Impact Factor
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    ABSTRACT: Excited states in the N=102 isotones ^{166}Gd and ^{164}Sm have been observed following isomeric decay for the first time at RIBF, RIKEN. The half-lives of the isomeric states have been measured to be 950(60) and 600(140) ns for ^{166}Gd and ^{164}Sm, respectively. Based on the decay patterns and potential energy surface calculations, including β_{6} deformation, a spin and parity of 6^{-} has been assigned to the isomeric states in both nuclei. Collective observables are discussed in light of the systematics of the region, giving insight into nuclear shape evolution. The decrease in the ground-band energies of ^{166}Gd and ^{164}Sm (N=102) compared to ^{164}Gd and ^{162}Sm (N=100), respectively, presents evidence for the predicted deformed shell closure at N=100.
    Physical Review Letters 12/2014; 113(26):262502. · 7.73 Impact Factor
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    ABSTRACT: Precise reaction cross sections (σR) for 24−38Mg on C targets at energies around 240 MeV/nucleon have been measured at the Radioactive Isotope Beam Factory at RIKEN. The σR for 36−38Mg have been measured for the first time. An enhancement of σR compared to the systematics for spherical stable nuclei has been observed, especially in the neutron-rich region, which reflects the deformation of those isotopes. In the vicinity of the drip line the σR for 37Mg is especially large. It is shown by analysis using a recently developed theoretical method that this prominent enhancement of σR for 37Mg should come from the p-orbital halo formation breaking the N = 28 shell gap.
    Physical Review C 12/2014; 89(6). DOI:10.1103/PhysRevC.90.061305 · 3.88 Impact Factor
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    ABSTRACT: This review presents the recent progress in computational materials design, experimental realization, and control methods of spinodal nanodecomposition under three- and two-dimensional crystal-growth conditions in spintronic materials, such as magnetically doped semiconductors. The computational description of nanodecomposition, performed by combining first-principles calculations with kinetic Monte Carlo simulations, is discussed together with extensive electron microscopy, synchrotron radiation, scanning probe, and ion beam methods that have been employed to visualize binodal and spinodal nanodecomposition (chemical phase separation) as well as nanoprecipitation (crystallographic phase separation) in a range of semiconductor compounds with a concentration of transition metal (TM) impurities beyond the solubility limit. The role of growth conditions, co-doping by shallow impurities, kinetic barriers, and surface reactions in controlling the aggregation of magnetic cations is highlighted. According to theoretical simulations and experimental results the TM-rich regions appear either in the form of nanodots (the {\em dairiseki} phase) or nanocolumns (the {\em konbu} phase) buried in the host semiconductor. Particular attention is paid to Mn-doped group III arsenides and antimonides, TM-doped group III nitrides, Mn- and Fe-doped Ge, and Cr-doped group II chalcogenides, in which ferromagnetic features persisting up to above room temperature correlate with the presence of nanodecomposition and account for the application-relevant magneto-optical and magnetotransport properties of these compounds. Finally, it is pointed out that spinodal nanodecomposition can be viewed as a new class of bottom-up approach to nanofabrication.
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    ABSTRACT: The CFHTLS presents a unique data set for weak lensing studies, having high quality imaging and deep multi-band photometry. We have initiated an XMM-CFHTLS project to provide X-ray observations of the brightest X-ray selected clusters within the wide CFHTLS area. Performance of these observations and the high quality of CFHTLS data, allows us to revisit the identification of X-ray sources, introducing automated reproducible algorithms, based on the multi-color red sequence finder. We have also introduced a new optical mass proxy. We provide the calibration of the red sequence observed in the CFHT filters and compare the results with the traditional single color red sequence and photoz. We test the identification algorithm on the subset of highly significant XMM clusters and identify 100% of the sample. We find that the integrated z-band luminosity of the red sequence galaxies correlates well with the X-ray luminosity with a surprisingly small scatter of 0.20 dex. We further use the multi-color red sequence to reduce spurious detections in the full XMM and RASS data sets, resulting in catalogs of 196 and 32 clusters, respectively. We made spectroscopic follow-up observations of some of these systems with HECTOSPEC and in combination with BOSS DR9 data. We also describe the modifications needed to the source detection algorithm in order to keep high purity of extended sources in the shallow X-ray data. We also present the scaling relation between X-ray luminosity and velocity dispersion.
    The Astrophysical Journal 11/2014; 799(1). DOI:10.1088/0004-637X/799/1/60 · 6.28 Impact Factor
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    ABSTRACT: We present weak lensing and X-ray analysis of 12 low mass clusters from the CFHTLenS and XMM-CFHTLS surveys. We combine these systems with high-mass systems from CCCP and low-mass systems from COSMOS to obtain a sample of 70 systems, which we divide into subsamples of 15 merging and 55 relaxed systems. We measure L-T, M-L and M-T scaling relations and find in all cases that the power-law slopes of the full, merging and relaxed subsamples are consistent. For the M-T we find slopes consistent with the self-similar model, whereas L-T results in steeper and M-L in flatter relations. We find a marginal trend for larger scatter and lower normalisation in the M-L and M-T relations for the merging subsample, which we attribute to triaxiality and substructure. We explore the effects of X-ray cross-calibration and find that Chandra calibration leads to flatter L-T and M-T relations. We also utilise the three surveys making up the sample as overlapping mass bins. For COSMOS and CFHTLS we find slopes consistent with the relation fitted to the full sample, whereas the high mass CCCP sample favours flatter slopes. We also find that intermediate mass systems have a higher mass for their luminosity. Unfortunately our sample does not enable direct measurement of a break at low masses, but we find a trend for enhanced intrinsic scatter in mass at low masses.
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    ABSTRACT: We present APEX LABOCA 870 micron observations of the field around the high-redshift radio galaxy MRC1138-262 at z=2.16. We detect 16 submillimeter galaxies in this ~140 square arcmin bolometer map with flux densities in the range 3-11 mJy. The raw number counts indicate a density of submillimeter galaxies (SMGs) that is up to four times that of blank field surveys. Based on an exquisite multiwavelength database, including VLA 1.4 GHz radio and infrared observations, we investigate whether these sources are members of the protocluster structure at z=2.2. Using Herschel PACS+SPIRE and Spitzer MIPS photometry, we derive reliable far-infrared photometric redshifts for all sources. Follow-up VLT ISAAC and SINFONI near-infrared spectra confirm that four of these SMGs have redshifts of z=2.2. We also present evidence that another SMG in this field, detected earlier at 850 micron, has a counterpart that exhibits Halpha and CO(1-0) emission at z=2.15. Including the radio galaxy and two SMGs with far-IR photometric redshifts at z=2.2, we conclude that at least eight submm sources are part of the protocluster at z=2.16 associated with the radio galaxy MRC1138-262. We measure a star formation rate density SFRD ~1500 Msun yr^-1 Mpc^-3, four magnitudes higher than the global SFRD of blank fields at this redshift. Strikingly, these eight sources are concentrated within a region of 2 Mpc (the typical size of clusters in the local universe) and are distributed within the filaments traced by the Halpha emitters at z=2.2. This concentration of massive, dusty starbursts is not centered on the submillimeter-bright radio galaxy which could support the infalling of these sources into the cluster center. Approximately half (6/11) of the SMGs that are covered by the Halpha imaging data are associated with Halpha emitters, demonstrating the potential of tracing SMG counterparts with this population (abridged).
    Astronomy and Astrophysics 10/2014; 570. DOI:10.1051/0004-6361/201423771 · 4.48 Impact Factor
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    ABSTRACT: We study the evolution of the total star formation (SF) activity, total stellar mass and halo occupation distribution in massive halos by using one of the largest X-ray selected sample of galaxy groups with secure spectroscopic identification in the major blank field surveys (ECDFS, CDFN, COSMOS, AEGIS). We provide an accurate measurement of SFR for the bulk of the star-forming galaxies using very deep mid-infrared Spitzer MIPS and far-infrared Herschel PACS observations. For undetected IR sources, we provide a well-calibrated SFR from SED fitting. We observe a clear evolution in the level of SF activity in galaxy groups. The total SF activity in the high redshift groups (0.5<z<1.1) is higher with respect to the low redshift (0.15<z<0.5) sample at any mass by 0.8 ± 0.12 dex. A milder difference (0.35 ± 0.1 dex) is observed between the low redshift bin and the groups at z ∼ 0. We show that the level of SF activity is declining more rapidly in the more massive halos than in the more common lower mass halos. We do not observe any evolution in the halo occupation distribution and total stellar mass-halo mass relations in groups. The picture emerging from our findings suggests that the galaxy population in the most massive systems is evolving faster than galaxies in lower mass halos, consistently with a "halo downsizing" scenario.
    Monthly Notices of the Royal Astronomical Society 09/2014; 000(1). DOI:10.1093/mnras/stu1883 · 4.90 Impact Factor
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    ABSTRACT: A basic design of enclosure and support facilities for the University of Tokyo Atacama observatory (TAO) 6.5-m telescope is described in this paper. The enclosure facility has a carousel shape with an open-space near the ground surface. The upper carousel rotates independently of the telescope. Horizontally opened slit doors, a dozen ventilation windows, wind and moon shields, and an overhead bridge-crane are equipped. For safety reasons, most of maintenance walkways are placed inside of the enclosure facility. An observation floor of the enclosure facility is connected to the support facility via a bridge for maintenance of observation instruments and a primary mirror of the telescope. Air inside of the enclosure and support facilities is exhausted to an underground tunnel.
    SPIE Astronomical Telescopes + Instrumentation; 07/2014
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    ABSTRACT: The University of Tokyo Atacama Observatory (TAO) is a project to construct a 6.5-meter telescope optimized for infrared observations at the summit of Co. Chajnantor, 5,640 m altitude. The high altitude and low water vapor (0.5mm in 25% percentile) of the site provide wide wavelength coverage from 0.3 to 38 micron including continuous window from 0.9 to 2.5 micron and new windows at wavelength longer than 25 micron. We report on the design and the current status of the mirror, the telescope, the summit and the base facilities in this paper.
    SPIE Astronomical Telescopes + Instrumentation; 07/2014
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    ABSTRACT: We performed optical and near-infrared multi-band linear polarimetry for highly reddened Type Ia SN 2014J appeared in M82. SN 2014J exhibits large polarization at shorter wavelengths, reaching $p\simeq 4.8$\% in $B$ band and steeply decreasing with wavelength, while it has almost constant position angle $\sim 40^{\circ}$ over the observed wavelength range. No significant temporal variation is found. Since intrinsic polarization of continuum light from a normal Type Ia supernova is generally weak ($\lesssim 0.3$\%) and the Galactic interstellar polarization component is likely negligibly small, the observed polarization is likely predominantly caused by the interstellar media within M82; however, we cannot completely exclude the possibility that it is caused by circumstellar media. The wavelength dependence of polarization can be explained by the empirical Serkowski-law at wavelengths shorter than $1 \mu$m and by an inverse power-law at wavelengths longer than $0.5 \mu$m. The peak polarization wavelength $\lambda_{\rm max}$ is quite short, $\lesssim 0.4\ \mu$m, suggesting the mean radius of polarizing dust grains is small ($< 0.1 \mu$m). The empirical law between $K$ and $\lambda_{\rm max}$ for the Galactic interstellar polarization is apparently broken, although the positive correlation between $R_{V}=A_{V}/E_{B-V}$ and $\lambda_{\rm max}$ seems to still hold. These facts suggest the nature of the dust grains in M82 is different from that in our Galaxy. These observed properties are similar to those in the other highly reddened Type Ia SNe 1986G and 2006X that have ever been polarimetrically observed, and this high probability suggests that such properties of dust grains are rather common in extragalaxies.
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    ABSTRACT: We demonstrate monolithic integration of pseudo-spin-MOSFETs (PS-MOSFETs) using vendor-made MOSFETs fabricated in a low-cost multi-project wafer (MPW) product and lab-made magnetic tunnel junctions (MTJs) formed on the topmost passivation film of the MPW chip. The tunneling magnetoresistance (TMR) ratio of the fabricated MTJs strongly depends on the surface roughness of the passivation film. Nevertheless, after the chip surface was atomically flattened by SiO2 deposition on it and successive chemical–mechanical polish (CMP) process for the surface, the fabricated MTJs on the chip exhibits a sufficiently large TMR ratio (>140%) adaptable to the PS-MOSFET application. The implemented PS-MOSFETs show clear modulation of the output current controlled by the magnetization configuration of the MTJs, and a maximum magnetocurrent ratio of 90% is achieved. These magnetocurrent behaviour is quantitatively consistent with those predicted by HSPICE simulations. The developed integration technique using a MPW CMOS chip would also be applied to monolithic integration of CMOS devices/circuits and other various functional devices/materials, which would open the door for exploring CMOS-based new functional hybrid circuits.
    Solid-State Electronics 07/2014; DOI:10.1016/j.sse.2014.06.004 · 1.51 Impact Factor
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    ABSTRACT: The kinetic energy of supernovae (SNe) accompanied by gamma-ray bursts (GRBs) tends to cluster near E52 erg, with 2.E52 erg an upper limit to which no compelling exceptions are found (assuming a certain degree of asphericity), and it is always significantly larger than the intrinsic energy of the GRB themselves (corrected for jet collimation). This energy is strikingly similar to the maximum rotational energy of a neutron star rotating with period 1 ms. It is therefore proposed that all GRBs associated with luminous SNe are produced by magnetars. GRBs that result from black hole formation (collapsars) may not produce luminous SNe. X-ray Flashes (XRFs), which are associated with less energetic SNe, are produced by neutron stars with weaker magnetic field or lower spin.
    Monthly Notices of the Royal Astronomical Society 06/2014; 443(1). DOI:10.1093/mnras/stu1124 · 5.23 Impact Factor
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    ABSTRACT: We present a catalog of 129 X-ray galaxy groups, covering a redshift range 0.04<z<1.23, selected in the ~3 square degree part of the CFHTLS W1 field overlapping XMM observations performed under the XMM-LSS project. We carry out a statistical study of the redshift evolution out to redshift one of the magnitude gap between the first and the second brightest cluster galaxies of a well defined mass-selected group sample. We find that the slope of the relation between the fraction of groups and the magnitude gap steepens with redshift, indicating a larger fraction of fossil groups at lower redshifts. We find that 22.2$\pm$6% of our groups at z$\leq$0.6 are fossil groups. We compare our results with the predictions of three semi-analytic models based on the Millennium simulation. The intercept of the relation between the magnitude of the brightest galaxy and the value of magnitude gap becomes brighter with increasing redshift. This trend is steeper than the model predictions which we attribute to the younger stellar age of the observed brightest cluster galaxies. This trend argues in favor of stronger evolution of the feedback from active galactic nuclei at z<1 compared to the models. The slope of the relation between the magnitude of the brightest cluster galaxy and the value of the gap does not evolve with redshift and is well reproduced by the models, indicating that the tidal galaxy stripping, put forward as an explanation of the occurrence of the magnitude gap, is both a dominant mechanism and is sufficiently well modeled.
    Astronomy and Astrophysics 05/2014; 566. DOI:10.1051/0004-6361/201322459 · 4.48 Impact Factor

Publication Stats

13k Citations
1,891.69 Total Impact Points

Institutions

  • 1973–2015
    • Kyushu University
      • • Department of Surgery and Oncology
      • • Division of Surgery
      • • Medical Hospital
      • • Division of Internal Medicine
      Hukuoka, Fukuoka, Japan
  • 2013–2014
    • National Astronomical Observatory of Japan
      Edo, Tōkyō, Japan
    • Hiroshima University
      • Division of Physical Sciences
      Hirosima, Hiroshima, Japan
    • University of Maryland, Baltimore County
      Baltimore, Maryland, United States
  • 1998–2014
    • Osaka University
      • • Department of Physics
      • • Institute of Laser Engineering
      • • Research Center for Nuclear Physics
      Suika, Ōsaka, Japan
    • St. Luke's International Hospital
      Edo, Tōkyō, Japan
  • 2006–2013
    • Japan Atomic Energy Agency
      • • Quantum Beam Science Directorate
      • • Advanced Photon Research Center
      Muramatsu, Niigata, Japan
    • NEC Corporation
      Edo, Tōkyō, Japan
  • 1986–2013
    • The University of Tokyo
      • • Department of Astronomy
      • • Faculty & Graduate School of Medicine
      • • Department of Electrical and Electronics Engineering
      • • Institute for Solid State Physics
      • • Department of Physics
      • • Research Center for Advanced Science and Technology
      • • Institute of Industrial Science
      Tōkyō, Japan
  • 2011–2012
    • The Astronomical Observatory of Brera
      Merate, Lombardy, Italy
    • Paris Diderot University
      Lutetia Parisorum, Île-de-France, France
  • 2010–2012
    • French National Centre for Scientific Research
      • • Institut de recherche en astrophysique et planétologie (IRAP)
      • • Institut d'astrophysique spatiale (IAS)
      Lutetia Parisorum, Île-de-France, France
    • Max Planck Institute for Extraterrestrial Physics
      Arching, Bavaria, Germany
    • Tokyo Institute of Technology
      • Graduate School of Interdisciplinary Science and Engineering
      Edo, Tōkyō, Japan
    • Showa University
      • Department of Oral and Maxillofacial Surgery
      Shinagawa, Tōkyō, Japan
    • Pierre and Marie Curie University - Paris 6
      • Institut d'astrophysique de Paris
      Paris, Ile-de-France, France
  • 1996–2012
    • National Institute for Fusion Science
      • Department of Helical Plasma Research
      Tokitsu-chō, Gifu, Japan
    • Fukuoka University
      • Department of Gastroenterology
      Hukuoka, Fukuoka, Japan
  • 1925–2011
    • European Southern Observatory
      Arching, Bavaria, Germany
  • 2001–2010
    • Kobe Tokiwa University
      Kōbe, Hyōgo, Japan
    • Japan Red Cross Fukuoka Hospital
      Hukuoka, Fukuoka, Japan
    • NTT DOCOMO
      Edo, Tōkyō, Japan
  • 1989–2010
    • Tohoku University
      • • Research Center of Atmospheric and Oceanic Studies
      • • Institute of Multidisciplinary Research for Advanced Materials (IMRAM)
      • • Department of Physics
      Sendai, Kagoshima-ken, Japan
  • 2009
    • Laboratoire d’Informatique Fondamentale de Marseille
      Marsiglia, Provence-Alpes-Côte d'Azur, France
    • California Institute of Technology
      • Spitzer Science Center
      Pasadena, California, United States
  • 1994–2009
    • Nara Medical University
      • Department of Urology
      Kashihara, Nara, Japan
    • Kanazawa Medical University
      • Department of Surgery II
      Kanazawa-shi, Ishikawa-ken, Japan
    • Dallas Zoo
      Dallas, Texas, United States
  • 2008
    • Ehime University
      • Department of Physics
      Matuyama, Ehime, Japan
  • 2007–2008
    • Kobe College
      Kōbe, Hyōgo, Japan
    • Center of Molecular Immunology
      La Habana, La Habana, Cuba
  • 2001–2005
    • Osaka City University
      • Department of Biochemistry
      Ōsaka, Ōsaka, Japan
  • 2002
    • The Graduate University for Advanced Studies
      Миура, Kanagawa, Japan
    • Noguchi Thyroid Clinic and Hospital Foundation
      Бэппу, Ōita, Japan
  • 1993–2001
    • Tokyo Medical and Dental University
      • • Department of Pulmonary Medicine
      • • Department of Internal Medicine
      Edo, Tōkyō, Japan
    • imec Belgium
      Louvain, Flemish, Belgium
    • Rikkyo University
      • Department of Physics
      Edo, Tōkyō, Japan
  • 1992–2001
    • National Institute for Basic Biology
      Okazaki, Aichi, Japan
    • Yamaguchi University
      Yamaguti, Yamaguchi, Japan
  • 1981–2001
    • Kyoto Prefectural University of Medicine
      • • Division of Anatomy and Neurobiology
      • • Department of Anesthesiology
      • • Department of Anatomy
      • • Department of Surgery
      Kioto, Kyōto, Japan
  • 1991–2000
    • Asahi General Hospital
      Asahi, Chiba, Japan
  • 1999
    • Yale-New Haven Hospital
      • Department of Pathology
      New Haven, Connecticut, United States
    • Nagoya University
      • Department of Energy Engineering and Science
      Nagoya-shi, Aichi-ken, Japan
  • 1991–1997
    • Kanazawa University
      • • School of Medicine
      • • Cancer Research Institute
      • • Department of Urology
      Kanazawa, Ishikawa, Japan
  • 1989–1996
    • Tokyo Metropolitan Hiroo Hospital
      • • Division of Cardiology
      • • Department of Pathology
      Edo, Tōkyō, Japan
  • 1994–1995
    • Niigata University
      • Division of Neuropathology
      Niahi-niigata, Niigata, Japan
  • 1990–1992
    • Shinshu University
      Shonai, Nagano, Japan
    • Konan University
      • Department of Physics
      Kōbe-shi, Hyogo-ken, Japan
  • 1989–1990
    • Toyama Medical and Pharmaceutical University
      Тояма, Toyama, Japan