Shizukanaru Don – Yakuza Side Story
 Shizukanaru Don - Yakuza Side Story (静かなるドン Shizukanaru Don aka. The Quiet Don) is a Japanese manga series written and illustrated by Tatsuo Nitta. It started serialization in Jitsugyo no Nihon Sha's seinen magazine Weekly Manga Sunday on November 15 1988. The manga was licensed and published in Taiwan by Da Ran Culture before being transferred to Sun Ho.The manga was adapted into an original video animation by Tokyo Movie Shinsha.