"Born in 1965. Worked at TecnoSoft since its first year. Left the company in 1985 and went to Arsys. After leaving Arsys in 1993, Yoshimura started a one-man company, Cyberhead, working as an OEM contractor for other companies. In 2001, Cyberhead was dismantled, and Katsunori underwent surgery to be turned into a woman. She is no called Kotori Yoshimura and runs a new development company."
S/he worked on the OG Thunder Force while at Technosoft, so it's a timeline issue. Also, Wibarm was originally released in 1986 for the PC-88, so really only 3 years after Thunder Force.
She is currently undergoing surgery to become a jet fighter.