White guy C.B. Cebulski wrote a number of comics while pretending to be Japanese.
From Vulture: In what is surely one of the most bizarre stories to come out of the comics industry in recent years, incoming Marvel Comics editor-in-chief C.B. Cebulski -- a Caucasian person -- has copped to writing under the Japanese-sounding pseudonym "Akira Yoshida" in the mid-aughts.
The revelation comes after a few days of speculation and scrutiny from the comics commentariat and was first confirmed to news site Bleeding Cool, then subsequently to Vulture. Cebulski had previously lied to Bleeding Cool journalist Rich Johnston, saying Yoshida was a real person; he created a fake backstory for an interview with comics site CBR; and executives at Marvel once met with someone they believed was Yoshida, but was in fact a Japanese translator who happened to be visiting the offices. Yes, really.
More here: Marvel's New Editor-in-Chief Admits Writing Under Japanese Pseudonym 'Akira Yoshida'