In 1934, he formed a screenplay writing group that managed to establish a presence in the film world with other young filmmakers living in Kyoto's Narutaki area, including Shintaro MIMURA, Sadao YAMANAKA, Eisuke TAKIZAWA, and Fuji YAHIRO; under the combined pen-name 'Kinpachi KAJIWARA,' this group wrote the scenarios for 'Hyakuman ryo no ko' (The Million-Dollar Vase) and 'Soshun Kouchiyama,' both directed by Yamannaka, and for 'Taikoki' (Chronicle of Hideyoshi) and 'Miyamoto Musashi' (Musashi Miyamoto), both directed by Takizawa, and every one of these films written by the group became smash hits.
9年には三村伸太郎、山中貞雄、滝沢英輔、八尋不二ら京都の鳴滝に住んでいた若手映画人らと映画会社の垣根を超えた脚本執筆集団を結成し、「梶原金八」の合同筆名で山中監督「百万両の壺」「河内山宗俊」、滝沢監督「太閤記」「宮本武蔵」のシナリオを執筆し、それぞれヒットを飛ばした。