Kensaku Shiraishi

"Battle Cossack!"

His main weapons were twin sais. He was the original second in command into the team. He was good at science as well as war. His hobbies included playing Pachinko, doing Cossack dance, and he enjoyed eating caviar.

Death
Kensaku left Big Baser without his Battle Cossack uniform to spend time with his sister. The Cutmen kidnapped his sister while Kensaku left to get shave ice for them. Cornered and without his uniform, Kensaku dodged fire and got his sister away, but he was still held at gunpoint. Bravely, he went on a suicide run of attack and was repeatedly shot. His friend, Makoto Jin, came to rescue. Kensaku's uniform was brought to him, but it was too late. He died surrounded by his team and sister.

Jin took Kensaku's uniform for himself and replaced him on the team and to avenge his friend's death.

Mecha

 * Battle Shark (shared with Japan, France, Kenya, and America)
 * Battle Fever Robo (shared with Japan, France, Kenya, and America)

Arsenal

 * Battleciever
 * Command Bat → Sais
 * Cossack Machine