Frene was a fan of right-wing nationalist Mitsuru Toyama as well as Nietzsche. He ended some of his letters with "Furuno Chuichi", which seems to have been his self-chosen Japanese name. In the NDL there's a 1941 work by a 古野忠一, could it be him? https://t.co/othkhMW8Sm https://t.co/OHRDKQKNeo