[Sunred]

So if it's an autobiographical novel, I guess this is his 8 Mile, pretty much, in the sense that it's a fictional novel based on his life. Side note, if they ever adapt this to live-action, I think we all know who's playing Matsuda/Matsuda-equivalent protagonist.

Real talk, though, had the late great Robert Baldwin (aka Sazer Gordo and Ramirez/Kyoryu Cyan) been still alive he would've been perfect for this task, because iirc he also did translation work at times apart from acting. Personally, I think he should seek a professional translator, though I understand where he's coming from, as he wants to deliver the nuances only tokusatsu fans are likely to identify easily but a professional may not catch it right away because they might not be well-versed in the genre, no matter how fluent.