Sanjougattai Transformers Go!

An event at Mount Fuji awakens Dragotron, the ruler of the Predacons, and his Four Oni lieutenants, who seek to revive their leader by gathering five hidden artifacts called the Legendiscs. In response, two teams of Autobot combiners from the Swordbots subgroup are summoned to oppose the Predacons. One team, the Swordbot Samurai, supports Isami Tatewaki, while the Swordbot Shinobi aligns with Tobio Fuuma. Both teams combine to fight the Predacons and enlist the boys in their mission. Under Optimus Prime's direction, the teams must locate the remaining Legendiscs, which are scattered across different historical eras. The series is a Japan-only follow-up to the Transformers Prime animated series, released with special editions of two Japanese magazines.