Nihonjin No Iden by Katsumi Tanaka, Yoko Imaizumi (456303925X 9784563039257 4-563-03925-X)
Shinrin O Mamoru: Seitaikei to Dobutsu No Shizen Seigyo by Kimito Furuta (4563039306 9784563039301 4-563-03930-6)
Kaizosareru Shokubutsu by Hiroshi Fujimaki, Yasuo Ukai (4563039314 9784563039318 4-563-03931-4)
