In 1996, his feature film directorial debut, 2/Duo (2/デュオ, 2/Dyuo) was released. Suwa's second film, M/Other, was released soon after in 1999, winning the prestigious FIPRESCI Prize at the 1999 Cannes Film Festival and being the subject of several other awards and critical acclaim, both in Japan and internationally. M/Other also won the award for best screenplay at the 50th Mainichi Film Awards. His assistant director in the film was Miwa Nishikawa.