Yukio Shiraki (born 1953) was a homeless Japanese man who lived in Kabukicho, Tokyo during the 1980s. On 12 December 1988, he and four other homeless men were confronted at Public Park 3 by former yakuza Kazuma Kiryu, who was investigating Tachibana Real Estate, and they agreed to tell Kiryu about Tachibana Real Estate in exchange for drinks.