No other than Surgeon General Shirō Ishii director of infamous Unit 731 https://en.wikipedia.org/wiki/Shirō_Ishii
Photos of Army and Naval Technology Merit Badges on Cavaliers
Major General Sueki Kusaba, head of the Fu-go program https://www.generals.dk/general/Kusaba/Sueki/Japan.html
About Fu-Go bombs https://en.wikipedia.org/wiki/Fu-Go_balloon_bomb
Document for his (and members of his team) badge https://asiamedals.info/threads/army-technology-merit-badge.23660/#post-348989
About Fu-Go bombs https://en.wikipedia.org/wiki/Fu-Go_balloon_bomb
Document for his (and members of his team) badge https://asiamedals.info/threads/army-technology-merit-badge.23660/#post-348989
Famous aircraft designer Takeo Doi https://en.wikipedia.org/wiki/Takeo_Doi_(aircraft_designer)
Creator of Kawasaki Ki-61 "Hien" https://en.wikipedia.org/wiki/Kawasaki_Ki-61
His badge and document https://asiamedals.info/threads/army-technology-merit-badge.23660/#post-348987
Creator of Kawasaki Ki-61 "Hien" https://en.wikipedia.org/wiki/Kawasaki_Ki-61
His badge and document https://asiamedals.info/threads/army-technology-merit-badge.23660/#post-348987
Vice Admiral Asakuma Toshihide.
Creator of Type 93 torpedo https://en.wikipedia.org/wiki/Type_93_torpedo
Creator of Type 93 torpedo https://en.wikipedia.org/wiki/Type_93_torpedo