Hiroyuki Toyota

(豊田裕之)

Profile Information

Affiliation: Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

Degree: Ph. D(Mar, 2005, The University of Tokyo)

Researcher number: 00415895
J-GLOBAL ID: 202101003284515547
researchmap Member ID: R000016575

Research Interests

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Electrical power engineering / Power Systems for Space Application

Research History

Apr, 2005 - Present

Associate Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency

Education

Apr, 2000 - Mar, 2005

Department of Electrical Engineering, The Graduate School of Engineering, The University of Tokyo
Apr, 1996 - Mar, 2000

Department of Electrial Engineering, The Faculty of Engineering, The University of Tokyo
Apr, 1993 - Mar, 1996

Eiko Gakuen High School
Apr, 1990 - Mar, 1993

Eiko Gakuen Junior High School
Apr, 1984 - Mar, 1990

Okamura Elementary School

Papers

Design, testing, and analytical characterization of a low-hysteresis linkage-actuated re-deployable radiator for deep space missions

Yuki Akizuki, Kenichiro Sawada, Tomihiro Kinjo, Hiroyuki Ogawa, Toshiaki Okudaira, Hiroyuki Toyota, Kazutaka Nishiyama, Hiroshi Imamura, Takeshi Takashima, Kan Matsumoto, Takeshi Kuratomi, Kazuki Watanabe, Hosei Nagano

Applied Thermal Engineering, 291 130129-130129, Apr, 2026
In-orbit Operation of CubeSat Moon Lander OMOTENASHI

Tatsuaki HASHIMOTO, Junji KIKUCHI, Ryo HIRASAWA, Shintaro NAKAJIMA, Naoki MORISHITA, Atsushi TOMIKI, Wataru TORII, Masatsugu OTSUKI, Tetsuo YOSHIMITSU, Yasuo ISHIGE, Kota MIYOSHI, Nobutaka BANDO, Chikako HIROSE, Hiroshi TAKEUCHI, Hiroyuki TOYOTA, Keiichi HORI, Kakeru TOKUNAGA, Aiko NAGAMATSU, Hitoshi MORIMOTO, Toshinori IKENAGA, OMOTENASHI project team

Journal of Evolving Space Activities, 3, Aug, 2025 Peer-reviewed
In Situ Evaluation of Perovskite Solar Cells after 8 MeV Proton Irradiation at Low Temperatures

Yu Miyazawa, Naoyuki Shibayama, Masashi Ikegami, Tsutomu Miyasaka, Ryoya Ishigami, Shusaku Kanaya, Hiroyuki Toyota, Kazuyuki Hirose

The Journal of Physical Chemistry C, Jul 8, 2025 Peer-reviewed
Moon Landing Results of SLIM : A Smart Lander for Investigating the Moon

Shinichiro Sakai, Kenichi Kushiki, Shujiro Sawai, Seisuke Fukuda, Yu Miyazawa, Takayuki Ishida, Kazuki Kariya, Takahiro Ito, Satoshi Ueda, Kentaro Yokota, Taro Kawano, Makiko Ohtake, Kazuto Saiki, Yusuke Nakauchi, Keisuke Michigami, Katsumi Furukawa, Yuki Akizuki, Shusaku Kanaya, Tomihiro Kinjo, Kenta Goto, Kenichiro Sawada, Yoshihide Sugimoto, Hiroshi Takeuchi, Atsushi Tomiki, Hiroyuki Toyota, Taiichi Nagata, Junichi Nakatsuka, Kenichiro Maki, Takahide Mizuno, Hirohide Shiratori, Masaki Nishino, Naoto Usami, Junji Kikuchi, Hitoshi Hamori, Ryo Hirasawa, Yusuke Shibasaki, Hiroaki Saito

Acta Astronautica, May, 2025 Peer-reviewed
Thermal and Mechanical Design of Thin-Film Solar Arrays on Textile Origami Deployable Structures

So Yeon Suk, Atsuki Ochi, So Tanaka, Delburg P. Mitchao, Mitsuhiko Yasuhara, Takashi Tomura, Hiraku Sakamoto, Osamu Mori, Hiroyuki Toyota, Yu Miyazawa, Shusaku Kanaya, Masanori Matsushita, Tamotsu Horiuchi, Ryota Takabe, Yuko Hisada, Rie Tokuda, Kenta Noguchi

AIAA SCITECH 2025 Forum, Jan 3, 2025

Misc.

Development of Electrical Power Systems for Venus Orbiter PLANET-C

TOYOTA Hiroyuki, SHIMADA Takanobu, UNO Masatoshi, HIROSE Kazuyuki, TAJIMA Michio, ISHII Nobuaki, NAKAMURA Masato, NOZAKI Yukishige, OKADA Yasuhiko, OOTO Hiroki, EGURO Takashi

IEICE technical report, 107(365) 13-18, Nov 23, 2007

JAXA is developing a Venus orbiter PLANET-C to be launched in 2010. This paper gives a summary of its power system and results of performance tests of the solar arrays and batteries. The solar arrays were confirmed to endure severe thermal cycles in the range of ?-170〜+170℃. The battery cells are subjected to simulation tests assuming practical operations, focusing on methods to control their deterioration.
直列/並列接続された電気二重層キャパシタのセル電圧バランス回路

鵜野将年, 豊田裕之, 曽根理嗣, 廣瀬和之, 田島道夫, 齋藤宏文

電気学会全国大会講演論文集, 2007(4), 2007
Voltage-time characteristics estimation by streamer model and equal-area criterion

Hiroyuki Toyota, Takashi Mizobuchi, Shigeyasu Matsuoka, Akiko Kumada, Kunihiko Hidaka

IEEJ Transactions on Fundamentals and Materials, 126(8) 789-794, 2006
電気二重層キャパシタ等を用いた直/並列接続モジュール用セル電圧均等化回路

鵜野将年, 豊田裕之, 曽根理嗣, 廣瀬和之, 田島道夫, 齋藤宏文

電池討論会講演要旨集, 47th, 2006
Applicability of Electric Double Layer Capacitors for Spacecrafts

鵜野将年, 曽根理嗣, 豊田裕之, 廣瀬和之, 田島道夫, 齋藤宏文

宇宙航空研究開発機構特別資料 JAXA-SP-, (06-006), 2006
長期連続運転時における電気二重層キャパシタの劣化挙動

鵜野将年, 豊田裕之, 曽根理嗣, 齋藤宏文, 廣瀬和之, 田島道夫, 藤田辰人, 森雅弘, 武田康男

宇宙エネルギーシンポジウム, 25th, 2006
Study of Electric Double Layer Capacitors for Long-Life Electrical Power Sub-Systems

鵜野将年, 曽根理嗣, 豊田裕之, 小川啓太, 武田康男, 廣瀬和之, 田島道夫, 齋藤宏文

宇宙科学技術連合講演会講演集(CD-ROM), 50th, 2006
充放電サイクル試験における電気二重層キャパシタの劣化解析

鵜野将年, 豊田裕之, 武田康男, 曽根理嗣, 斎藤宏文, 広瀬和之, 田島道夫, 藤田辰人, 森雅裕

電気化学会大会講演要旨集, 73rd, 2006

Presentations

InGaP系多接合太陽電池が実現したJAXA宇宙科学ミッションの軌跡と進化

豊田裕之

豊田工業大学山口眞史名誉教授紫綬褒章受章記念講演会, Jun 26, 2025 Invited
Development of Lightweight Solar Array Panel for Japan’s Lunar Lander SLIM

Toyota, H., Kanaya, S., Miyazawa, Y., Kukita, A., Nakamura, T., Sumita, T., Fukuda, S., Sawai, S., Sakai, S., Yamaguchi, H., Juso, H., Washio, H., Takamoto, T.

35th International Photovoltaic Science and Engineering Conference, Nov, 2024 Invited
太陽電池が牽引する宇宙科学ミッション～はやぶさ、SLIM、その先へ～

豊田裕之

日本太陽光発電学会次世代太陽電池セル・モジュール分科会 2023年度第2回研究会, Mar 1, 2024 Invited
宇宙機搭載電源システムの概要と宇宙用太陽電池の最新動向

豊田裕之

宇宙工学講座「宇宙機搭載電源の入門講座」, Oct 25, 2023 Invited
Effects of Radiation on Solar Arrays

Hiroyuki Toyota

2023 Satellite Science Workshop, Jun 16, 2023 Invited

Teaching Experience

Apr, 2016 - Present

High-voltage engineering (Meisei University)

Research Projects

Key technology Research and High-altitude demonstration to realize the world first Mars exploration using Airplane

Grants-in-Aid for Scientific Research, Japan Society for the Promotion of Science, Apr, 2012 - Mar, 2015

NAGAI Hiroki, OYAMA Akira, TOKUTAKE Hiroshi, TAKEUCHI Shinsuke, TOYOTA Hiroyuki, OTSUKI Masatsugu, NONOMURA Taku, ANYOJI Masayuki, YONEMOTO Koichi, FUJII Kozo, ASAI Keisuke

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