Journal Paper

• Masahiko Nakase, Ria Mishima, Takumi Abe, Tomohiro Okamura, Hidekazu Asano. Evaluation of Aluminum Hexacyanoferrate utilization for PGM and Mo removal from simulated high-level-raffinates in reprocessing for repository area minimization, Annals of Nuclear Energy, 224 (2025) 111569, May 2025.
• Kenji Takeshita, Tomohiro Okamura, Masahiko Nakase, Takumi Abe, Kenji Nishihara. Impact of Fast Reactor Fuel Type on Backend Processes in the Nuclear Fuel Cycle, Progress in Nuclear Science and Technology (Accepted), May 2025.
• Masahiko Nakase, Takahiro Nishihara, Fauzia Hanum Ikhwan, Tomohiro Okamura, Kota Matsui. Chemoinformatics Applications for Minor Actinides Separation Study, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 3, No. 2024, p. 16, Apr. 2025.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Yuki Konishi, Kenji Nishihara, Hitomi Ishida, Tomoo Yamamura. Investigation on Fuel Cycle Based on Actinide Management Towards Sustainable Use of Nuclear Energy: Analysis of the Necessity and Usefulness of MA Temporary Storage Technology for the Sustainable Nuclear Fuel Cycle, Bulletin of the Laboratory for Zero-Carbon Energy, Laboratory for Zero-Carbon Energy, Institute of Integrated Research, Institute of Science Tokyo, Vol. 3, No. 2024, pp. 24-25, Apr. 2025.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Analysis of the Necessity and Usefulness of MA Temporary Storage Technology for the Sustainable Nuclear Fuel Cycle, Progress in Nuclear Science and Technology, Vol. 7, Feb. 2025.
• Masahiko Nakase, Takahiro Nishihara, Fauzia Hanum Ikhwan, Tomohiro Okamura, Kota Matsui. Development of Integrated Actinide Chemistry Application, AACE, for Acceleration of Actinide Chemistry Experiments, 6th International ATALANTE Conference on Nuclear Chemistry for Sustainable Fuel Cycles (ATALANTE-2024), EPJ Web of Conferences, Vol. 317, No. 01007, Jan. 2025.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. Impact of MA Temporary Storage Process on the Reduction of Final Disposal Burden in the Advanced Nuclear Fuel Cycle, 6th International ATALANTE Conference on Nuclear Chemistry for Sustainable Fuel Cycles (ATALANTE-2024), EPJ Web of Conferences, Vol. 317, No. 01009, Jan. 2025.

International Conference (Not reviewed / Unknown)

• Andika Putra Dwijayanto, Masahiko Nakase, I.W. Ngarayana, Tomohiro Okamura, Gagad Rahmadi, Djarot S. Wisnubroto. Toward Energy Sustainability: Nuclear Fuel Cycle Simulation for Indonesia's 43.9 GW Nuclear Power Program, The 2nd Saudi International Conference on Nuclear Power Engineering (SCOPE-2), Nov. 2025.
• Andika Putra Dwijayanto, Tomohiro Okamura, Kenji Nishihara, Masahiko Nakase. Exploring the Potential of Molten Chloride Fast Reactor as a Versatile Zero-Carbon Energy System, The 7th International Symposium on Innovative Materials and Processes in Energy Systems (IMPRES2025), Oct. 2025.
• Masahiko Nakase, Andika Putra Dwijayanto, Tomohiro Okamura, Kenji Nishihara. Study on the introduction scenario of innovative fast chloride molten salt reactors for the realization of a zero-carbon society, The 7th International Symposium on Innovative Materials and Processes in Energy Systems (IMPRES2025), Oct. 2025.
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Comparison of Molten Chloride Fast Reactor Burnup Calculation using Serpent-2 and OpenMC, The 8th International Energy Conference ASTECHNOVA2025, Oct. 2025.
• Masahiko Nakase, Takahiro Nishihara, Tomohiro Okamura, Shahab. [Keynote speech] DebianExtractant Exploration for Actinide Separation: Harnessing IDEaL Database and Chemoinformatics Tools, International Solvent Extraction Conference 2025 (ISEC2025), Sept. 2025.
• Takumi Abe, Taiga Suzuki, Tomohiro Okamura, Masahiko Nakase, Kenji Nishihara, Kenji Takeshita. Implementation of Uranium Enrichment Cascade Model to Nuclear Fuel Cycle Simulator, NEA Workshop on Digital Safety Case Integration for Radioactive Waste and Geological Disposal, Apr. 2025.
• Tomohiro Okamura, Takahiro Nishihara, Kunitaka Jimichi, Hidekazu Asano, Masahiko Nakase. NEUChain: Next Generation Digital Twin for Nuclear Energy System and AI-Based Knowledge Management System, NEA Workshop on Digital Safety Case Integration for Radioactive Waste and Geological Disposal, Apr. 2025.
• Takahiro Nishihara, Tomohiro Okamura, Masahiko Nakase. NEUChain: An Blockchain & AI-Based Secured Knowledge Management System for Nuclear Energy System, NEA Workshop on Digital Safety Case Integration for Radioactive Waste and Geological Disposal, Apr. 2025.
• Masahiko Nakase, Takahiro Nishihara, Tomohiro Okamura, Fauzia Hanum Ikhwan, Alaaeldine Shaker Mohammed Saleh, Kota Matsui. Chemoinformatic attempts to elucidate candidate extractant structures for enhanced MA separation, International Symposium on Green Transformation Initiative and Innovative Zero-Carbon Energy Systems, GXI-ZES, Jan. 2025.
• Tomohiro Okamura, Takumi Abe, Taiga Suzuki, Masahiko Nakase, Kenji Takeshita, Kenji Nishihara. Three Years of NMB4.0: A Driving Force Toward Nuclear Innovation Through Open Access Nuclear Fuel Cycle Simulator Development, International Symposium on Green Transformation Initiative and Innovative Zero-Carbon Energy Systems, GXI-ZES, Jan. 2025.
• Kenji Takeshita, Tomohiro Okamura, Naoto Aizawa, Masahiko Nakase, Takashi Shimada, Kenji Nishihara. Current Status and Next Development of Fuel Cycle Analysis Technique for the Future Scenarios: Research Committee on Fuel Cycle Analysis Technique for FutureNuclear Scenarios in Atomic Energy Society, International Symposium on Green Transformation Initiative and Innovative Zero-Carbon Energy Systems, GXI-ZES, Jan. 2025.

Domestic Conference (Not reviewed / Unknown)

• Masahiko Nakase, Takahiro Nishihara, Tomohiro Okamura, Taisuke Tsukamoto, Takashi Shimada, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(12)機械学習を用いたMA抽出剤側鎖構造の探査スキームの構築, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Takashi Shimada, Tomoo Yamamura, Miki Harigai, Keisuke Nishimura, Yuki Fukuda, Kazuhisa Yamashina, Masahiko Nakase, Tomohiro Okamura, Kenji Takeshita, Yasutoshi Ban. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(10) 処分面積低減の視点からのMA分離の目標設定, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Kouki Ono, Tomohiro Okamura, Takumi Abe, Takahiro Nishihara, Masahiko Nakase, Kenji Nishihara, Taiga Suzuki. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(4) AI を用いた原子力発電予測に向けた諸量評価モデルの開発, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Hidekazu Asano, Tomohiro Okamura, Takahiro Nishihara, Masahiko Nakase. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(3) AIとナレッジベースを組合せた人材育成, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Takahiro Nishihara, Tomohiro Okamura, Hidekazu Asano, Masahiko Nakase. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(2) 知識継承のための AI エージェント, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Tomohiro Okamura, Takahiro Nishihara, Hidekazu Asano, Masahiko Nakase. TASKI:AIを基盤とした原子力ナレッジマネジメントシステム(1) 原子力分野への生成AIの活用, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Masahiko Nakase, Takahiro Nishihara, Ahid NURMANJAYA, Ryota Nakazawa, Joonho LEE, Tomohiro Okamura. [Invited Speech] Study on a scheme for designing MA separation reagents based on machine learning, Institute for Materials Research, Tohoku University Oarai / Alpha Joint meeting, Sept. 2025.
• Kenji Takeshita, Tomohiro Okamura, Masahiko Nakase, Takashi Shimada, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(14) 軽水炉/高速炉共存期におけるプルトニウムマネジメント, Atomic Energy Society of Japan 2025 Autumn Meeting, Sept. 2025.
• Tomohiro Okamura, Takahiro Nishihara, Masahiko Nakase. 福島第一廃炉研究への東京科学大の取り組み（1）多様な廃棄物のデジタル管理に関する研究, The 21st Academic Conference of the Japan Society of Maintenology, July 2025.
• Takashi Shimada, Tomoo Yamamura, Miki Harigai, Masahiko Nakase, Kenji Takeshita, Tomohiro Okamura, Yasutoshi Ban, Hiroki Tsukamoto, Keisuke Nishimura, Hiromichi Gima. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(4)燃料サイクルにおけるアクチノイドのマネジメント基本方針とKPI, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Tomoo Yamamura, Miki Harigai, Takashi Shimada, Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Yuki Konishi, Keisuke Nishimura, Taisuke Tsukamoto, Yasutoshi Ban. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(3)研究・プロセスの全体像と社会実装に向けたTRL設定, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Takumi Abe, Taiga Suzuki, Tomohiro Okamura, Masahiko Nakase, Kenji Nishihara, Kenji Takeshita. NMB4への遠心分離理想カスケード濃縮モデルの実装と回収ウラン活用シナリオの諸量評価, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Masahiko Nakase, Tomohiro Okamura, Yoshihisa Tahara, Hiroyasu Mochizuki, Tsuyoshi Murakami, Tadafumi Koyama. 塩化物溶融塩高速炉のフィージビリティー研究(V)(4)溶融塩高速炉の諸量評価, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Fauzia Hanum Ikhwan, Masahiko Nakase, Takahiro Nishihara, Tomohiro Okamura, Kenji Takeshita, Taisuke Tsukamoto, Keisuke Nishimura, Takashi Shimada, Tomoo Yamamura. Investigation on Fuel Cycle based on Actinide Management Towards Sustainable Use of Nuclear Energy(8) Separation of minor actinide by using DGA derivatives and diluent with low heat of Vaporizatio, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Tomohiro Okamura, Masahiko Nakase, Kenji Takeshita, Takashi Shimada, Koki Hibi, Yuki Konishi, Keisuke Nishimura, Hitomi Ishida, Tomoo Yamamura. 持続的な原子力利用のためのアクチノイドマネジメントを備えた燃料サイクルの研究(5)LF共存期におけるアクチノイドマネジメント機能の諸量評価, Atomic Energy Society of Japan 2025 Spring Annual Meeting, Mar. 2025.
• Tomohiro Okamura, Takahiro Nishihara, Taiga Suzuki, Takumi Abe, Kenji Nishihara, Masahiko Nakase. 分散型台帳技術と諸量評価コードの結節による核燃料サイクルのデジタルツイン構築, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.
• Masahiko Nakase, Tomohiro Okamura, Yoshihisa Tahara, Hiroyasu Mochizuki, Tsuyoshi Murakami, Tadafumi Koyama. NMBを用いた溶融塩高速炉の諸量評価研究, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.
• Gagad RAHMADI, Tomohiro Okamura, Andika Putra DWIJAYANTO, Masahiko Nakase, Djarot Sulistio Wisnubroto. Nuclear Fuel Cycle Simulation for Indonesia's 43.9 GW Nuclear Power Program, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.
• Takumi Abe, Tomohiro Okamura, Masahiko Nakase, Kenji Nishihara, Kenji Takeshita. 核燃料サイクルシミュレータNMB4のこれまで, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.
• Ria Mishima, Tomohiro Okamura, Takumi Abe, Masahiko Nakase. 次世代核燃料サイクルの再処理工程におけるフェロシアン化アルミニウムを用いたPGM、Mo分離の導入による高レベル放射性廃棄物の処分負荷低減に関する研究, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.
• Andika Putra Dwijayanto, Tomohiro Okamura, Masahiko Nakase. Techno-economical and Uranium Resource Consideration of Marine MCFR Core Design Selection, "6th Zero Carbon Energy Institute Colloquium, FY 2024 ""NuMBAC2025: Benchmarking and Utilization of Nuclear Fuel Cycle Simulator""", Feb. 2025.

Research Highlight

• Masahiko Nakase, Fauzia Hanum Ikhwan, Tomohiro Okamura, Ryota Nakazawa, Kenji Shirasaki. Sovlent extraction and complexation studies on the lightes Actinide, Actinium-3 (2025). 2025-2025. 東北大学金属材料研究所施設利用共同研究　アルファ放射体実験室 施設利用共同研究.
  
• Masahiko Nakase, Fauzia Ikhwan, Tomohiro Okamura, Ryota Nakazawa, Kenji Shirasaki. Chemoinformatic approach of exploring solvents for Minor Actinide extraction-3 (2025). 2025-2025. 東北大学金属材料研究所附属量子エネルギー材料科学国際研究センター 施設利用共同研究.
  
• Masahiko Nakase, Tomohiro Okamura, KENJI TAKESHITA. [Press release] A study group launched in Japan on the use of nuclear power in the maritime industry. Could this be the trump card for achieving carbon zero? - Initiatives of the Japan Society of Naval Architects and Ocean Engineers' "Committee for the Study of Nuclear Energy Use in the Maritime Industry". 2025-. A study group launched in Japan on the use of nuclear power in the maritime industry. Could this be ....
  
• Masahiko Nakase, Tomohiro Okamura, Kenji Takeshita, Kenji Nishihara, Takumi Abe. Organizer of the 6th Zero Carbon Energy Institute Colloquium, FY 2024 "the Nuclear Fuel Cycle Simulation Workshop NuMBAC2025", Science Tokyo. 2025-2025.

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