Patrick Frater Asia Bureau ChiefKawase Naomi, the Japanese auteur who won the Camera d’Or at the Cannes Film Festival in 1997 and has had films in competition on multiple other occasions, is paying a flying visit to the festival with “Official Film of the Tokyo 2020 Olympic Games Side A,” which screens on Wednesday evening.A feature-length documentary, “Side A” is focused largely on the athletes. “Side B,” Kawase’s next project, casts a wider net and captures what Kawase calls a turning point for Japanese society.The International Olympic Committee hired me to do it. I was elected or nominated by the IOC.