Daikōkai jidai no Nihon to kinzoku kōekiYoshimitsu Hirao, Kenji Iinuma, Shōsuke Murai · First published 2014Open the Tome
Jūyō bunkateki keikan e no michiTadashi Ebisawa, Hideo Hattori, Kenji Iinuma · First published 2012Open the Tome
No to hara no kankyōshiTakakazu Yumoto, Hiroyuki Satō, Kenji Iinuma · First published 2011Open the Tome
Hito to kankyō to bunka isanAmino, Yoshihiko, Munetoshi Gotō, Kenji Iinuma · First published 2000Open the Tome
