Maji Taizo. Transaction on Saltpeter of Shirakawa Village in the Second Half of the 18th Century Described by Old Letters Found from Shinshoji-Temple. Annual report of the Faculty of Education, Gifu University. Humanities and social sciences. 2009. 57. 2. 121-126
The unknown history of Shirakawago : The circulation of nitrogen in relation with urine, saltpeter and rice, and dail life in the Edo Era ( Yukasita kara mita Shirakawago )
Fubaisha 2007 ISBN:9784833105378