In Episode One, Yanagihara meets with Rin and Kouki to talk about Ueyama Estates and its deep connections in real estate, acting like "land sharks". He is also the first to mention the connection between the group and Aoyama Pharmaceuticals. Yanagihara confirms for Rin in Episode Three that the former residents of Death Island were among the victims of each recent bombing in Tokyo.
In Episode Four, Yanagihara, long since retired from the police, helps Teruki by bringing him to Asogi Consulting after Ruon's 'murder'. He tries to help more by calling to give the flight number that Teruki is on but is fatally shot by a sniper... who was 'given' the assassination order, not by his superiors, but by Ruon via the Net. Mimi is later shown bringing flowers to the spot where Yanagihara was killed.