The official YouTube channel for the seven-member dance and vocal unit Genin wa Jibun ni Aru. (GNJB for short), started streaming the music video for their latest digital single, "Kaen" ( Feast of Fire ), which is featured as the opening theme for the summer 2026 TV anime Iron Work Jan! Genin wa Jibun ni Aru. "Kaen" Music Video Iron Work Jan! Anime Creditless Opening Video The meaning of the unit name Genin wa Jibun ni Aru. is "The Cause Lies With Me." The seven members, who initially performed under the name BATTLE STREET, began their activities under that name in August 2019. "Kaen" released digitally on July 6 and reached number 31 on the Oricon weekly digital single chart . The unit's member Ryota Nagano shared the following comment about "Kaen" on the anime's official website : We, Genin wa Jibun ni Aru., have been chosen to perform the opening theme song for the anime "Iron Wok Jan!" All of the members are truly honored by this opportunity. While this work is about cooking, it also seems to be a kind of fighting manga. This song features the sense of speed typical of GNJB, blending logic and madness in a way that perfectly matches this work. All seven of us sang our hearts out so that Genin wa Jibun ni aru. could add its own unique flavor to this historic and distinctive work. We hope you enjoy this song. "Kaen" digital jacket Genin wa Jibun ni Aru.