Dayu Adachi (born 1985) was a Japanese street criminal who was affiliated with the Bloody Eye gang in Kabukicho, Tokyo during the 2000s. On 9 December 2005, he and several other Bloody Eye gangsters were beaten down in street fights with Kazuma Kiryu as he made his way to Debolah to confront Big Akai and Little Akai about their kidnapping of Haruka Sawamura.