Kume Eizaemon (Tsuken) was an engineer working in Sanuki (currently Kagawa Prefecture) during the Edo Period in the early 19th century. He was born in 1780 in the village of Umayado in Ochi-gun in eastern Sanuki (currently Higashikagawa City). Already proficient with machinery from his childhood, Kume studied astronomy and surveying in Osaka, and after returning to Sanuki in 1802 he used this scientific knowledge in his work. By the order of the Takamatsu Domain, Kume surveyed the domain's land and created maps. He also made astronomical measurements, designed and supervised civil engineering works, and improved and developed firearms. In addition, he proposed to the domain further development of the Sakaide salt pans, whose expansion contributed to the domain's finances.
Katsutaro Kamada, founder of Kamada Kyosaikai (mutual benefit society), operates the remaining Sakaide salt pans handed down from the Takamatsu Domain. He has also researched and collected materials related to Kume Tsuken and put relics and documents from his family on display to pay tribute. Designated as an Important Cultural Property, the collection contains 1,061 items. At the Kamada Kyosaikai Folk Museum in front of Sakaide Station, there is an area dedicated to Kume Tsuken that displays some of these materials.