Kazuo Yamashina

He is the president of a food product import company. He lives alone in a single house in Suginami. He joined forces with the Shuueikai and they are smuggling drugs, such as stimulants hidden in the food products his company is importing.

Many people died due to his drugs, but he has managed to amass a huge fortune. Two employees of Yamashina's company have gone missing. There is no good reason for those two to have absconded. Those two found out about Yamashina's smuggling operation. It is believed that both of them were wiped out by the Shuueikai in order to keep their mouths shut.