, better known as, is a Japanese screenwriter and novelist.
In 1991, he won the Ministry of Education, Culture, Sports, Science and Technology's Newcomer Award for his writing on the medical drama series (Japanese: 外科医有森冴子). His gay-themed drama series (Japanese: 同窓会), which aired on prime-time television in 1993, is considered a pioneering work for its depiction of gay relationships.
Izawa also wrote several manga series that were illustrated by Yumiko Igarashi in the 1980s, including Georgie!, which was adapted into an anime series; ; and . In the late 1990s, he was involved in a legal dispute with Igarashi over merchandising rights to Georgie!