Kanshigumi: The Ivory Lotus
This boy works at Iyashite Kudasai with his mother, Aiko. He looks about twelve years old.
He recently fell in with a group of young yakuza who promised him that he would be able to help buy medicine for his ailing grandmother if he helped them out by watching for magistrates now and then. He was dragged out of a party at a grimy brothel by Yoritomo Shunsen and, hopefully, set back on an honest path.
(Picture is Fujiwara Tatsuya in the movie Sabu.)