Why Do You Fight? was born during the filming of Masked Fighter 1.

I went to the Blue Shark event to shoot Super Rider in Masked Fighter 1. I knew The Blue Shark existed, but I was unfamiliar with him.

While speaking with Blue Shark for the first time there, I learned that he is still fighting as an active mixed martial arts fighter even though he is in his late 40s, his wife is also an active dancer, and they hold his professional wrestling events with his three small children.

Then, I saw the Blue Shark family as “traveling and living gypsies.”

We met and talked for the first time, but perhaps the film production had already begun.

We started shooting in October 2022 and completed the film in April 2024.

When I watched the film after its completion, I was amazed at how such a dense story could be told.

The film's title was also decided upon near the film's completion.

I got that hint about this film production from Super Rider.

When he addressed us at the stage greeting, he said, “This movie will never end.”

At the end of the film, you can see the scene of the next film.