Ogon no Inu

From Hokkaido to Tokyo, hunting dog Goro embarks on a long and grueling journey to reach home. Goro's master held a weapons smuggling case and the corruptions of those who are involved.
(Source: IMBD)
~~ Adapted from the novel "Inubue" (犬笛) by Jukô Nishimura (西村寿行).