Taisei Kōki
Taisei Koki (大成光機, Taisei Kōki) was a Japanese camera maker after World War II. Various Japanese websites say that it was the same company as the prewar Fuji Kogaku. Indeed its logo is very similar to the Fuji Kogaku logo, the words TAISEI KŌKI written in a cemented doublet lens design with a protuberance on top, maybe an allusion to the Mount Fuji.