It's terribly sad to have to announce that a leading historian of Japanese technology, Hitoshi Yoshioka A lad*, passed away on 14 January 2018 at the age of sixty-four. Yoshioka is probably best known for his contribution as an editor and author, together with Shigeru Nakayama and Kunio Got, of the voluminous and definitive Japanese Contemporary History of Science and Technology series.' English speakers too will know him as a coauthor of English-language works on Japanese technology, along with Nakayama and Morris Low (Low, Nakayama, and Yoshioka 1999). Within the history of Japanese technology, he worked especially on nuclear engineering, and his Social History of Japanese Nuclear Engineering is the gold standard in the field.
