Snow Man's Koji Mukai Returns as Old Osomatsu in Live-Action Sequel
Mukai's cameo as a past version of the lead character bridges the two live-action films while the franchise reboots its central cast with a new generation of actors.
Reporting from 3 sources: Eiga Natalie, Comic Natalie, Cinema Today.
Snow Man member Koji Mukai appears in the live-action film "Osomatsu-san: Human Scum-ification Plan!!!!!?" as the character Old Osomatsu, reprising his role from the 2022 first film. Mukai played the eldest brother Osomatsu in the earlier movie, and in the sequel he portrays a version described as "a man who once lived as Osomatsu." The film opened nationwide in Japan on June 12, 2026. Mukai shot his scenes in a single day and noted that his body remembered the performance from three years prior, though he joked that the new wig felt different from the one he had grown attached to. The sequel features a new set of sextuplets played by members of Ae! group, Keita Kusama Richard, and Takuya Nishimura. The cast also includes Miho Watanabe, Yusuke Onuki, Naeno, Iori Noguchi, Hiroki Miyake, Tae Kimura, Hitomi Miyauchi, Yudai Chiba, and Eiichiro Funakoshi. Taisuke Kawamura directs from a screenplay by Takayuki Takuma, with distribution by Toho.
Mukai, a member of the nine-person group Snow Man, said he understood the challenges of coordinating a large cast. The new sextuplets are played by Ae! group members Ryoki Shomon, Seiya Suezawa, Ken Kojima, and Masaya Sano, alongside Keita Kusama Richard and Kansai Junior Takuya Nishimura. Mukai described the new film as "closer to the original" manga than the 2022 version was.
The story follows the six Matsuno brothers, who remain jobless and lazy past age 20. A researcher launches a "Human Scum-ification Plan" that makes society value trashiness. The brothers team up with a researcher named Sakura to restore order.
Mukai shot his scenes in a single day. He said his body remembered the performance from three years prior but noted the new wig felt different from the one he had grown attached to. He called out to fans: "We Snow Man also want to liven things up, so please come to the theater!"
The film opened nationwide in Japan on June 12, 2026. Taisuke Kawamura directs from a screenplay by Takayuki Takuma. Production is by Hachinoji and Pipeline, with distribution by Toho.
Synthesized by Yomimono from the 3 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.
Sources
- Eiga Natalie Snow Man向井康二、映画「おそ松さん」に“旧・おそ松”役で出演していた
- Comic Natalie 映画「おそ松さん」にSnow Man向井康二が旧・おそ松役で出演
- Cinema Today 実写『おそ松さん』2弾にSnow Man向井康二出演！旧・おそ松役、かつらはニューバージョン