Kotarō Fūma (風魔 小太郎 Fūma Kotarō) was the name adopted by several famous ninjas during the Sengoku period of Japan, all of whom were the leader of the Fūma Ninja Clan at one time. They are Tobio's ancestors.
One Kotarō Fūma encountered the Swordbot Shinobi Team. He had some funny ideas about what it means to be a ninja.
One Kotarō Fūma carried the yellow legendisc. When Tobio and the Shinobi Team arrived in Kotaro's time period, he offered to give it to Tobio only if Tobio could take it from him. Tobio fell for this ruse, and attempted to steal the disc from Kotaro, refusing the help of his Autobot allies. Kotaro let Tobio steal a fake disc then refused to give Tobio the real one, reasoning that no true ally of justice would ever resort to deceit or refuse the aid of a friend.
Tobio started to protest this, but was interrupted by the arrival of the oni Judora and Gaidora, who summoned Jaki and set the surrounding forest on fire. Remembering what Kotaro said, Tobio enlisted the help of Sensuimaru to put out the flames and then risked his life in an attempt to save two monkeys threatened by the fire. Seeing Tobio's action caused Kotaro to change his mind and save both Tobio and the monkeys from a burning branch. Kotaro then gave Tobio the legendisc