How many movies have Fumizô Tachibanaya and Hachirō Kai collaborated on?

They have worked on 3 movies together! Their first movie together was Sekkusu dokku: Midarana chiryō (1980) while their highest rated movie together was Kairaku Onsenkyô: Nyotaiburo (1981). They have not worked together since Onsen Geisha: Yubune de Ippatsu (1982). They are most known for their comedy films together.