Yasushi Kawasaki (1981-) was a Japanese street criminal who was affiliated with the "16-Bit" youth gang in Kabukicho, Tokyo during the 2000s. On the night of 18 December 2006, his friend Saemon Morita picked a fight with Kazuma Kiryu and Kaoru Sayama as they attempted to enter the gang's old hideout, the Amano Building, only for Kiryu to beat him down and force Morita to reveal the location of the gang's leader Yunosuke Nashino so that Kiryu could access the building.