Shutaro Takeda

Kyushu University | Kyudai

Due to climate change and social issues, environmental, social, and governance (ESG) solutions receive increased attention and emphasis. Being influential market leaders, investors wield significant power to persuade companies to prioritize ESG considerations. However, investors' preferences for specific ESG topics and changing trends in those pref...

In order to explore the possibility of carbon credits for greening projects, which play an important role in climate change mitigation, this paper examines a formula for estimating the amount of carbon fixation for greening activities in urban areas through tree planting. The usefulness of the formula studied was examined by conducting calculations...

Understanding students' physiological characteristics is essential in piano teaching. However, how can teachers in the field know what music suits their students physiologically? This paper explores a new theory in sport science called, "the Four-Stance Theory" to provide teachers with a simple yet practical method to understand students' physiolog...

Is the age-long sarcasm of “fusion is always 30 years away” still valid in 2023? This paper answers this question through a literature review of researchers' expectations about when fusion energy will be “ready” for over the past 40 years. In conclusion, according to the collective remarks by scientists, the popular phrase “fusion is always 30 year...

Making fusion power viable both technologically and commercially has been a challenge for decades due to the great complexity of the science and engineering challenges. In recent years, changes in both government policies and the emergence of private fusion companies have ushered a newfound push to accelerate fusion energy development. Kyoto Fusion...

One of the major research and development challenges on the critical path to achieving a fusion pilot plant is demonstrating the viability of power production from fusion. In August 2022, Kyoto Fusioneering launched the construction of the world’s first integrated testing facility for fusion power generation. The primary testing loop of the facilit...

For Japan to achieve its targets for carbon neutrality and reduction of carbon dioxide (CO2) emissions, decarbonization of road transport is essential. Japan regards next-generation vehicles, including hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell vehicles, as a key means...

This article outlines Kyoto Fusioneering’s (KF’s) initial engineering and development activities for its self-cooled lithium lead-type blanket: Self-Cooled Yuryo Lithium-Lead Advanced (SCYLLA). We provide details on overall design, including an initial tritium breeding ratio (TBR) assessment via neutronics analysis, as well as the status of SCYLLA-...

For sustainametrics to gain a firm ground as an effective concept, the meaning of development shall be revisited first without depending on any statistical measurement. The word “development” originally meant the act of disclosure or opening a cover to disclose what is inside. Martin Heidegger (1889–1976) analyzed the significance of alētheuein , o...

Hydrogen is a low or zero-carbon energy source that is considered the most promising and potential energy carrier of the future. In this study, the energy sources, feedstocks, and various methods of hydrogen production from power generation are comparatively investigated in detail. In addition, this study presents an economic assessment to evaluate...

日本学術会議近畿地区会議学術講演会2022 総合知をはぐくむ学び

During the past two decades, the world has seen exponential growth in the number of companies reporting environmental, social, and governance (ESG) data, and various ESG metrics have been proposed and are now in use. ESG metrics play a crucial role as an enabler of investment strategies that consider ESG factors, which are often referred to as “ESG...

Progress in the development of fusion energy has gained momentum in recent years. However questions remain across key subject areas that will affect the path to commercial fusion energy. The purpose of this review is to expose socio-economic areas that need further research, and from this assist in making recommendations to the fusion community, (a...

The coronavirus (COVID-19) pandemic has affected society in immeasurable ways, including investment. As the pandemic has impacted society's values, it has proven to be a major turning point for environmental, social, and governance (ESG) investment. This investment approach, which evaluates a company's ESG ratings alongside traditional financial me...

Interest in reducing the greenhouse gas emissions from conventional power generation has increased the focus on the potential use of hydrogen to produce electricity. Numerous life-cycle assessment (LCA) studies of hydrogen-based power generation have been published. This study reviews the technological and methodological choices made in hydrogen-ba...

It is a widespread view in the fusion community that steady-state, water-cooled fusion power plants can utilize the power generation systems of conventional pressurized water reactor (PWR) fission plants as is. However, what would happen to a fusion power plant in the case of plasma disruption? The authors constructed a dynamic simulation model of...

Nuclear fusion energy has significant potential to fulfil the future demand for low carbon energy sources. Coordinated international efforts by States, supported by the IAEA, have pushed fusion development steadily forward in the past several decades. In recent years, a number of alternative approaches have been proposed that would open up new path...

Period poverty refers to the situation where women have insufficient access to their sanitary equipment. This could undermine principle of human dignity and cause health problems. By improving the period poverty, the presence of the women could be increased in the society, potentially leading to economic growth. In this study, the authors conducted...

This study investigates the role of infrastructure construction, from people’s perspective, in Laos. The actual impact of infrastructure construction on the local population was surveyed through an online survey (N = 105). About 40% of respondents experienced road construction in the last five years. They answered the quality of the new road is dec...

There is a need to derive hydrogen from renewable sources, and the innovative stewardship of two natural resources, namely the Sun and forest, could provide a new pathway. This paper provides the first comparative analysis of solar-driven hydrogen production from environmental angles. A novel hydrogen production process proposed in this paper, name...

Chivalry is a concept that is both familiar and distant to many Japanese. There is no other social class in the world that resembles knights as much as the samurai in Japan. However, why is there such a gap between the behaviour of knights and samurais, even though they are both a social class with honor? This paper compares chivalry and Bushido, t...

Since the advent of a new academic regime that examines the nexus of humans and water, resilience studies of the coevolution of human–water systems have advanced rapidly because of the climate change. However, the concept of resilience poses a new social challenge. This study analyzes the gap in resilience studies through a Sri Lankan water-related...

This study conducted a systematic literature review of the technical aspects and methodological choices in life cycle assessment (LCA) studies of using hydrogen for road transport. More than 70 scientific papers published during 2000–2021 were reviewed, in which more than 350 case studies of use of hydrogen in the automotive sector were found. Only...

This paper proposes and analyses an innovative sustainable energy option; a concentrated solar and biomass hybrid carbon capture and sequestration plant. This conceptual plant utilizes concentrated solar as the heat source for the biomass gasification process. The produced synthetic gas will then be used for electricity generation and carbon dioxid...

Throughout the past five decades, research and development in the world of nuclear fusion has been led by large publicly funded national laboratories. Currently, fusion energy technology development is being embraced by small, fast-moving start-up companies. This edited book provides an overview of the commercialisation of fusion energy technology...

This chapter provides a review of the technological approaches to fusion energy to provide a foundation level understanding to allow the readers to better traverse the later chapters of this book. Three broad conceptual spaces—magnetic confinement fusion (MCF), inertial confinement fusion (ICF), and magneto-inertial fusion (MIF)—are first outlined,...

アウトリーチ戦略の立案に資するため，全国1,000人を対象とした核融合の認知度ならびにイメージに関するアンケート調査を実施した．核融合の一般認知度は40.0％ であった．日本人の核融合に対するイメージは回答率の高い順に「危険（60.7％）」「不安（41.9％）」「信頼できない（24.4％）」であり，86.0％ が「核融合」と「原子力」が異なる技術であることを認知していなかった．核融合を認知していた回答者は，認知していなかった回答者より核融合に対し全般的に良いイメージを抱き，研究開発への投資を受容する傾向にあった．その一方で，核融合を知っていると答えた回答者の方が，核融合は「複雑」「わかりにくい」と回答する傾向が強かった．これらの結果は，今後のアウトリーチ活動にあたり，１）核融合と原子力の混同...

Due to its complicated market mechanisms, conventional economic metrics such as Levelised Cost of Electricity may not be able to accurately represent the economic performance of nuclear fusion power plants on deregulated electricity markets. For this reason, this paper quantitatively analyzes the economic performance of steady-state fusion power pl...

Countries of the Association of Southeast Asian Nations (ASEAN) have been dependent on conventional energy resources because of their abundance, which explains the slow progress of renewable energy. The ASEAN Centre for Energy predicts that a 17% share of renewable energy can be achieved by 2025. Geothermal, hydro, and bioenergy are restricted by r...

This study quantitatively estimated the future Japanese plutonium stockpile though a monte carlo approach to give a neutral outlook to 2050. The results indicated that; 1) The probability that the Japanese government keeps its promise of reducing the plutonium stockpile without changing its reprocessing policies is around 60%. 2) The peak amount of...

The adoption of renewable energy technologies in developing nations is recognized to have positive environmental impacts; however, what are their effects on the electricity supply chain workers? This article provides a quantitative analysis on this question through a relatively new framework called social life cycle assessment, taking Malaysia as a...

Nuclear fusion, the process that powers the sun and the stars, is heralded as the ultimate energy source for the future of mankind. The promise of nuclear fusion to provide clean and safe energy, while having abundant fuel resources continues to drive global research and development. However, the goal of reaching so-called “breakeven” energy condit...

Energy storages such as flywheel or battery would be required for fusion power plants to be installed to unstable electrical grids. In this study, a formula to evaluate the required energy storage specifications was presented and integrated into the FUSAC systems code. Life cycle costs of a fusion plant were calculated with the modified systems cod...

The authors conducted a quantitative reevaluation of the short-term Japanese plutonium balance forecast until 2040 with a new numeric model, in the aim of contributing to the policy making toward the stable US-Japan alliance as well as the East Asian region. The Japanese nuclear fuel cycle was replicated as a system dynamics model on Stella with of...

Link Model, a participatory rural appraisal programme for micro-infrastructure construction funding aid, has received much attention in Bangladesh over the last few decades. This study aims to contribute to the latest phase of the Link Model project, launched in July 2016 by the Bangladeshi government. To this end, the authors conducted a field sur...

The purpose of this presentation understand the real situation of Fukushima in 2018 through 21 quantitative questions. How much is the actual radiation level? Is the seafood / agricultural produce contaminated? This presentation gives quantitative numbers to help you grasp the actual situation of the region.

Here the authors propose a novel fusion plant concept, nuclear fusion IGFC, for the first time as a technically feasible option to accelerate the realization of commercial Tokamak plants. One of the major obstacles in the early realization of commercial Tokamak plants is the dogma that “Tokamaks have to be large to achieve net positive energy gain....

The authors constructed a dynamic simulation model of a nuclear fusion power plant on Modelica language to obtain fundamental knowledge on the plasma control requirements for the future commercial fusion power plants. The fusion power plant model was designed with a 1500-MW thermal output tokamak reactor with He-cooled Li2TiO3 solid breeder blanket...

The authors propose nuclear biomass gasification plant as an advancement of conventional gasification plants. Environmental impacts of both fission & fusion plants were assessed through life cycle assessment. The result suggested the reduction of green-house gas emissions would be as large as 85.9% from conventional plants, showing a potential for...

核融合という海水を燃料にするサステイナブルなエネルギー源を用い、都市ゴミを高温分解することで、海水とゴミから液体燃料を作り出す革新的プラントの研究紹介です。（一般向けオープンキャンパス発表資料）

✓ 再エネの大幅な導入，自由化の実現など電力市場は大きく変容しつつある．核融合発電の実現へ向け，これらを織り込んだ新たな経済試算を実施した． ✓ 従来想定されていなかった新たな市場収入，および支出の存在が明らかとなった． ✓ 電力自由化により，核融合発電所（定常炉）の価格競争力は 5.78％高くなる可能性が示唆された． ✓ 感度分析の結果，計画外停止頻度が核融合発電所の電力市場収益に大きく影響を与える事が示された．

学生の受け入れ戦略の立案は，３０年後の核融合の世界を描くこと． 核融合発電の実現に向けたコミュニティの活性化のために，学際領域・社会領域に核融合分野が関わる決意が今，求められているのではないだろうか． 学際領域に身を置く学生に対するアウトリーチは，来る発電に向け必要となる多様なバックグラウンドを持つ若い人材を養成するとともに，核融合分野が外の分野と繋がるための橋頭堡と成りうるのでは？

ICT を中核とするステムテクノロジーである。我が国が その歴史上初めてエネルギー強国となり得る時代が、今訪れようとしている。 １ ． エネルギー資源のトランジションと スタグネーション 従前、エネルギー資源とは天賦であり、その国の領土領海に資源を産出する国が自ずか ら利益を得ることが当然であると考えられてきた。故にその時々の時勢に即した資源を産 出する国は興隆し、また資源を算出する土地を巡り紛争が繰り返されてきた。つまり、エ ネルギーとは地政学そのものである、というのが従来の常識であった。 果たして、この常識は永劫不変なのであろうか？これを考察するため、はじめに人類の エネルギー資源の移り変わりを俯瞰したい。 図１は、過去 150 年間において人類が利用してきた一次エネルギー源のシェアの推...

将来の有力市場たる発展途上国においては，�小規模核融合炉が市場安定性の観点から”要請”される．一方、先進国においては系統安定性の問題は小さくなるが，自由競争市場における制約がある．

第11回日本原子力学会関西支部 若手研究者による研究発表会・発表資料

Future power grids would be unstable because of the larger share of renewable and nuclear power sources. This instability might bring some additional difficulties to fusion plant installation. Therefore, the authors carried out a quantitative feasibility study from the aspect of grid stability through simulation. Results showed that the more renewa...

This study analyzed adverse effects of fusion plants on the stability of small-scale grids through simulation-based case studies. Major frequency fluctuations were observed in the event of a plant start-up and a sudden interruption of fusion electric output power, as represented by plasma disruption, suggesting difficulties in fusion plant installa...

The adverse effects of DEMO on the future electrical grid due to sudden output interruptions, such as disruptions, were analyzed quantitatively. The results indicated that when considerable percentage of renewables are installed, the power system would experience serious frequency deviations as large as 0.4 Hz, which is greater than the current tol...

This study analyzed adverse effects of fusion plants on the stability of small-scale grids through simulation-based case studies. Major frequency fluctuations were observed in the event of a plant start-up and a sudden interruption of fusion electric output power, as represented by plasma disruption, suggesting difficulties in fusion plant installa...

Innovative Waste-to-Fuel System with Nuclear Fusion

なぜ思修館でエネルギー研究を行うのか

京都大学思修館のブランディング戦略の提案

A poster presentation at the 5th DEMO Platform Meeting at Rokkasho, 2014

京都大学学祭融合研究着想コンテスト2014「海洋インバースダムによる革新的ビジネスモデルの創出」

京都大学学際融合研究着想コンテスト2014発表資料

With the aim of evaluating the effect of a Mongolian dairy product derived Lactobacillus paracasei spp. paracasei (strain 06TCa22) (Lpp) on the cytokine-mediated immune responses to Vibrio harveyi infection, we examined 16 cytokine expressions in the Japanese pufferfish, Takifugu rubripes. Fish were orally treated with the heat-killed Lpp at 1 mg g...