Leader of the Koga ninja dogs. Tesshin is the son of Kurojaki, who appeared in Ginga Nagareboshi Gin. (In GNG, Tesshin was nicknamed Chibi)

A dog named Weed happens to hear that he is the son of Gin, The great leader of Ohu, Who lead the dogs of Ohu to victory in a fight against monsterous bear Akakabuto. Weed wants to find his father no matter of what. On a way to his father Weed meets many friends and enemies.
 
(Source: Anime News Network)

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A wild dog named Weed happens to hear that he is the son of Gin, the great leader of Ohu, who lead the dogs of Ohu to victory in a fight against the monstrous bear Akakabuto. Weed wants to find his father no matter of what. On his search, Weed meets many friends and enemies.


A giant demon bear named Akakabuto has taken over Futago pass. Shortly after, a silver, tiger-striped Akita pup named Gin is born and is trained as a bear-dog. Gin is brought to Riki (the leader of a large pack of dogs and Gin's father) to join the pack. Riki let's him join after proving his strenght and sends his platoons to all parts of Japan to recruit strong males to fight Akakabuto. Gin, the third generation of bear-dogs goes through many hardships for the purpose of stopping the terrifying bear, Akakabuto. 
(Source: AnimeNewsNetwork)

After the fierce battle in Echigo, the members of the Oshu Army were living peaceful days in the dog paradise of Futago Pass. During the scorching heat of summer, a dog appears before the Oshu Army, asking for help from a bandit's rampage. Weed and his men immediately depart, but Gin's age is showing as he sees him off... An ominous atmosphere slowly builds as the final battle of the Ginga looms!! (Source: Nihonbungeisha, translated)