This is an interlude or sub-mission in Red Steel. It's where Scott Monroe first meets the Sanro Kai.

The Mission

Upon returning to Harry's Club, Harry Tanner directs Scott to a meeting of the Sanro Kai, a group of Sato Gumi Yakuza members focusing on profitable peace, the same group of which Isao Sato was a part.

Akira Matsubara, the leader of that group, explains to Scott that Tokai has taken over their separate districts throughout Tokyo and has brought chaos since Sato's death. So he calls upon Scott to help them get back their respective districts and restore honor.