Shimazu Taro is the older brother of Saburo. He is proficient in the Two Heavens technique. He is the second son of Shimazu Hideo. He is a friend to Yamato's fallen brother Tenno.
He first appear in this book when his younger brother Saburo introduced him to Jack, Akiko and Yamato. He started to learn the Two Heavens.
He reappears in this book. He is still learning the Two Heavens. He teaches Jack how to use the Two Heavens. He dies when trying to protect Yori from The Red Devils in the Battle of Osaka Castle.
- Saburo - They don't have much relationship but Saburo still admires his fallen brother.
- Jack - He gives Jack some training in the Two Heavens.