M Tanaka

National Institute for Fusion Science, Tokitsu-chō, Gifu, Japan

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Publications (803)1850.31 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.
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    ABSTRACT: The near-infrared (NIR) spectral range (2-5 μm) contains a number of interesting features for the study of the interstellar medium. In particular, the aromatic and aliphatic components in carbonaceous dust can be investigated most efficiently with the NIR spectroscopy. We analyze NIR spectra of the diffuse Galactic emission taken with the Infrared Camera onboard AKARI and find that the aliphatic to aromatic emission band ratio decreases toward the ionized gas, which suggests processing of the band carriers in the ionized region.
    Proceedings of the International Astronomical Union 08/2015; 10(H16):703-704. DOI:10.1017/S1743921314012976
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    ABSTRACT: We present an extraction of azimuthal correlations between two pairs of charged pions detected in opposite jets from electron-positron annihilation. These correlations may arise from the dependence of the di-pion fragmentation on the polarization of the parent quark in the process $e^+e^- \rightarrow q \bar{q}$. Due to the correlation of the quark polarizations, the cross-section of di-pion pair production, in which the pion pairs are detected in opposite jets in a dijet event, exhibits a modulation in the azimuthal angles of the planes containing the hadron pairs with respect to the production plane. The measurement of this modulation allows access to combinations of fragmentation functions that are sensitive to the quark's transverse polarization and helicity. Within our uncertainties we do not observe a significant signal from the previously unmeasured helicity dependent fragmentation function $G_1^\perp$. This measurement uses a dataset of 938~fb$^{-1}$ collected by the Belle experiment at or near $\sqrt{s}\approx10.58$ GeV.
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    ABSTRACT: Free water tritium (FWT) and organically bound tritium (OBT) concentrations in pine needles have been investigated to understand the regional background tritium concentration in Toki City. Samples were regularly collected from pine trees on the National Institute for Fusion Science campus (1998-2012) and the nearby Shiomi Park (SP; 2002-12). FWT and OBT concentrations of the former samples ranged from 0.33 to 0.92 and 0.41 to 1.10 Bq l(-1), respectively, while those of the latter samples ranged from 0.32 to 0.86 and 0.33 to 0.79 Bq l(-1), respectively. Results of both sampling sites were almost the same, and they have been gradually decreased year by year. Concentration level of tritium for Toki City was close to the average background level in Japan. The OBT/FWT ratios were almost 1.0. The apparent half-life of FWT in this period was estimated as almost 10 y, and that of OBT was estimated as almost 12 y; these values were almost the same as the physical half-life. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.
    Radiation Protection Dosimetry 05/2015; DOI:10.1093/rpd/ncv246 · 0.86 Impact Factor
  • M Tanaka, T Uda
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    ABSTRACT: Atmospheric tritium concentrations of HTO, HT and CH3T have been measured at Toki, Japan, for the environmental impact assessment of tritium for a fusion test facility. According to the data from 2004 to 2012, the concentrations of HT and HTO in water vapour tend to increase in spring. The seasonal variation in HT concentration at Toki was compared with the H2 concentration between 1990 and 2005 at Tae-ahn Peninsula, Republic of Korea, which is at approximately the same latitude as Toki. The monthly average of HT-specific activity varied from 1.24 × 10(5) to 1.76 × 10(5) TU. The peak of the monthly average H2 concentration did not match that of HT. This indicates that the mechanism of the production or the source of HT might be different from the production mechanism of H2. © The Author 2015. Published by Oxford University Press. All rights reserved. For Permissions, please email: journals.permissions@oup.com.
    Radiation Protection Dosimetry 05/2015; DOI:10.1093/rpd/ncv241 · 0.86 Impact Factor
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    ABSTRACT: We report the late-time evolution of Type IIb Supernova (SN IIb) 2013df. SN 2013df showed a dramatic change in its spectral features at ~1 year after the explosion. Early on it showed typical characteristics shared by SNe IIb/Ib/Ic dominated by metal emission lines, while later on it was dominated by broad and flat-topped Halpha and He I emissions. The late-time spectra are strikingly similar to SN IIb 1993J, which is the only previous example clearly showing the same transition. This late-time evolution is fully explained by a change in the energy input from the 56Co decay to the interaction between the SN ejecta and dense circumstellar matter (CSM). The mass loss rate is derived to be (~5.4 +- 3.2) x 10^{-5} Msun/yr (for the wind velocity of ~20 km/s, similar to SN 1993J but larger than SN IIb 2011dh by an order of magnitude. The striking similarity between SNe 2013df and 1993J in the (candidate) progenitors and the CSM environments, and the contrast in these natures to SN 2011dh, infer that there is a link between the natures of the progenitor and the mass loss: SNe IIb with a more extended progenitor have experienced a much stronger mass loss in the final centuries toward the explosion. It might indicate that SNe IIb from a more extended progenitor are the explosions during a strong binary interaction phase, while those from a less extended progenitor have a delay between the strong binary interaction and the explosion.
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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; 47(3). DOI:10.1016/j.transproceed.2014.12.047 · 0.95 Impact Factor
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    ABSTRACT: The half-lives of 21+ states were measured for 102,104Zr and 106,108Mo to test a new implementation of a LaBr3(Ce) array at the RIBF, RIKEN, Japan. The nuclei of interest were produced through the fission of a 345 MeV/nucleon 238U beam and selected by the BigRIPS separator. Fission fragments were implanted into the WAS3ABi active stopper, surrounding which, 18 LaBr3(Ce) detectors provided fast γ-ray detection. Timing between the LaBr3(Ce) array and plastic scintillators allowed for the measurement of half-lives of low-lying states. The preliminary results, which agree with literature values, are presented along with experimental details.
    Acta Physica Polonica Series B 03/2015; 46(3):721. DOI:10.5506/APhysPolB.46.721 · 1.00 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.
    Monthly Notices of the Royal Astronomical Society 10/2014; 451(2). DOI:10.1093/mnras/stv923 · 5.23 Impact Factor
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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

Publication Stats

13k Citations
1,850.31 Total Impact Points

Institutions

  • 1996–2015
    • National Institute for Fusion Science
      • Department of Helical Plasma Research
      Tokitsu-chō, Gifu, Japan
    • Fukuoka University
      • Department of Gastroenterology
      Hukuoka, Fukuoka, Japan
  • 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
    • University of Maryland, Baltimore County
      Baltimore, Maryland, United States
    • Hiroshima University
      • Division of Physical Sciences
      Hirosima, Hiroshima, Japan
  • 1998–2014
    • Osaka University
      • • Department of Physics
      • • Research Center for Nuclear Physics
      Suika, Ōsaka, Japan
    • St. Luke's International Hospital
      Edo, Tōkyō, Japan
  • 2010–2013
    • National Institutes Of Natural Sciences
      Edo, Tōkyō, Japan
    • Tokyo Institute of Technology
      • Graduate School of Interdisciplinary Science and Engineering
      Edo, Tōkyō, Japan
    • Max Planck Institute for Extraterrestrial Physics
      Arching, Bavaria, Germany
    • Pierre and Marie Curie University - Paris 6
      • Institut d'astrophysique de Paris
      Paris, Ile-de-France, France
    • Showa University
      • Department of Oral and Maxillofacial Surgery
      Shinagawa, Tōkyō, Japan
  • 2001–2013
    • Osaka City University
      • Department of Biochemistry
      Ōsaka, Ōsaka, Japan
    • Japan Red Cross Fukuoka Hospital
      Hukuoka, Fukuoka, Japan
    • Kyushu Rosai Hospital
      Kitakyūshū, Fukuoka, 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
  • 1925–2011
    • European Southern Observatory
      Arching, Bavaria, Germany
  • 2001–2010
    • Kobe Tokiwa University
      Kōbe, Hyōgo, Japan
  • 1994–2010
    • Hokkaido University
      • • Laboratory of Medicinal Chemistry
      • • Graduate School of Pharmaceutical Sciences
      • • Faculty of Pharmaceutical Sciences
      Sapporo, Hokkaidō, Japan
    • Kanazawa Medical University
      • Department of Surgery II
      Kanazawa-shi, Ishikawa-ken, Japan
    • Dallas Zoo
      Dallas, Texas, United States
  • 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
  • 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
  • 2005–2008
    • National Institute of Advanced Industrial Science and Technology
      • Electronics and Photonics Research Institute
      Tsukuba, Ibaraki, Japan
    • Hitachi, Ltd.
      Edo, Tōkyō, Japan
  • 2006
    • Japan Synchrotron Radiation Research Institute (JASRI)
      Tatsuno, Hyōgo, Japan
    • NEC Corporation
      Edo, Tōkyō, Japan
  • 1998–2006
    • University of Occupational and Environmental Health
      • Department of Obstetrics and Gynecology
      Kitakyūshū, Fukuoka, Japan
  • 2004–2005
    • Waseda University
      • • Graduate School of Science and Engineering
      • • Department of Applied Chemistry
      Edo, Tōkyō, Japan
  • 2002
    • 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
  • 1991–2001
    • Kanazawa University
      • • Cancer Research Institute
      • • School of Medicine
      • • Department of Urology
      Kanazawa-shi, Ishikawa-ken, Japan
  • 1992–2000
    • National Institute for Basic Biology
      Okazaki, Aichi, Japan
    • Yamaguchi University
      Yamaguti, Yamaguchi, Japan
  • 1991–2000
    • Asahi General Hospital
      Asahi, Chiba, Japan
  • 1999
    • Nagoya University
      • Department of Energy Engineering and Science
      Nagoya-shi, Aichi-ken, Japan
  • 1997
    • Toshiba Corporation
      Edo, Tōkyō, Japan
  • 1989–1996
    • Tokyo Metropolitan Hiroo Hospital
      • • Division of Cardiology
      • • Department of Pathology
      Edo, Tōkyō, Japan
  • 1995
    • YAMASA Corporation
      Tiba, Chiba, Japan
  • 1987–1995
    • 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