Fumiaki
I appreciate you not speeding through the novel and making it an overpowered main character. But at this point in the novel, I'm having difficulty understanding what I'm looking forward to in going forward reading. (1).It's the universe he's in that I'm looking forward to him exploring eventually. (2)On the other hand it's the interaction with the characters in the world. And on that point it's only been his father for a while now, And it's kind of getting a little boring Now that the trust issues are resolved for the most part. so I don't mind the story if the MC is a weak child, and we're not exploring the 'universe' but I do mind if the story is one note constantly (i.e. training/bonding arc with dad)
The only thing I would like to say is to research a little bit more about characters fighting abilities and strength. Zoro strength wise - continental to moon level Speed wise - sub relativistic to FTL + Characters from jjk that would be able to fight him in pure strength would be gojo and sukuna as at there strongest they can be considered planetary although they is somewhat under contention.