I just started reading this and caught up today. For people who says that mc should be op because he is a legendary fighter, if you read again, he is not meant to. Yes, he has the experience but he is not in full control of the body and he was not revived for the purpose of fighting, rather to just help the girl revive the dojo. At one point even the white cat said it didn't revive the old man to enter the fighting scene again, which it called "cheating" compared to other fresh talents.
In any case, I like the story so far. It has acceptable balance of realism and entertainment, with not everything can work out with just spirit, the part he persistently making connections ever since he was young is very much as real life; people won't give their time if they don't know you. It also plays around the replaced soul trope, usually the original soul will cooperate with the replacement but I never see they go to each other and trade fists, this kind of tension is fresh. I also like that eventhough the subjects of the story are JKs but author never exploits the characters for fan service, the characters are very likeable because they are people, and people have goals and make mistakes, making the story less predictable and tight.
The author could however try to reduce the explanatory text boxes, it is nice to read in depth explanations but sometimes it's just too much.
Added to watch list. Also thanks for the scanlators, keep up the good work!