抄録
Offer Organization: Japan Society for the Promotion of Science, System Name: Grants-in-Aid for Scientific Research, Category: Grant-in-Aid for Scientific Research (B), Fund Type: -, Overall Grant Amount: - (direct: 10400000, indirect: 3120000)
(1)We surveyed bibliography of two traditional Japanese mathematicians, Ishizuka Rokurobe and Yokokawa Genetsu. (2)We investigated the origin of Japanese traditional land-survey instruments in the 17th century, brought from Dutch. (3)We surveyed natural historian, Yoshio Tanaka's manuscripts and made new catalogue of his materials. (4)We published the general history of traditional Japanese mathematics in Sendai Clan. (5)We researched and analyzed the historical articles of natural disasters in Miyagi prefecture.