Name: Banken
Japanese name: 番犬
Sex: Male
Breed: Tosa

Banken is the Japanese term for guard dog. He guards a small pond close to Nero's territory. One evening, the ducks in the pond is attacked by the Shiba, Sasuke. Banken fights Sasuke, and nearly kills him.

However, Sasuke gets help from the English setter GB and the young Akita Weed. Both of them fight until Banken hears a sound coming from the mountains. He gets so terrified that he gives up the fight and hides inside his dog shelter. He's not seen in the story again.