What's the best place on the planet for catching up on the entire range of contemporary Japanese cinema, from experimental shorts to commercial hits? My candidate is Nippon Connection, a festival in Frankfurt, Germany, whose 16th edition unspools May 24-29. Headed by festival director Miram Klomfass and organized by an all-volunteer team, the festival is presenting nearly 100 films over six days, and will also host other Japanese cultural events.