[1][better source needed] He attended the Yale School of Drama in New Haven, Connecticut, where he had a playwriting class with classmate and future comedian Lewis Black.
The New York Times was critical of the play, which it said lacked adequate characterization, while reviewer Frank Rich complimented "its author's willingness to reach, as well as his flickers of talent: Mr. Yoshimura can write theatrical scenes, spin dark jokes and ask big questions.
Yoshimura was inspired to write it based on an episode of the HBO hidden-camera documentary show Taxicab Confessions, where a New York City detective discussed a similar real-life event.
[11] Yoshimura and the co-writers received an Emmy nomination for Outstanding Writing for a Miniseries or Movie,[12] although the award ultimately went to Simon and Mills for The Corner.
[13] Yoshimura co-created and wrote for the 2004 Fox series The Jury, along with Homicide executive producers Barry Levinson and Tom Fontana.