given how much Japanese mythology is altered copies of Chinese mythology, yes, it would still make sense.would the dragon motif still make sense if it was not Chinese?
Not knowing what you intended I had imagined that it would be like animal totems often used in various levels of fantasy. The bestial representation of the users soul. Having the spirits be superpowers in their own right is perfectly fine and not something I was opposing. My take on it was; whatever the MC's totem may have been originally, his training with the Vet ensured it would manifest as a snake, and the training by the Japanese masters daughter redeems that snake into a dragon.So these spirits themselves would not be actual supernatural powers but just represent a form of change, showing the progression and knowledge gained? I originally planned that the drug pharma companies and tournament sponsor would want to get a hold of the MC's powers and so would his former evil mentor the bad vet teacher, after he discovers the MC's powers as well.
As for the big pharma angle, it'd be amusing to see them try to get something chemical out of a spiritual effect. Had you been interested in leaning into Xianxia, or even higher fantasy levels of chop-sockey and Wuxia, there are quite a lot of medical-mystical legends that get used (and abused) by the genre, so there they might have actually been able to get something.
poison, specifically.Maybe the evil bad vet teacher could represent a mix of snakes and the darkness/destruction side of dragons?
Destructive Yin is poison and rot, undermining and smothering everything it touches.
Destructive Yang is Fire and force, unyielding, harsh and judgemental.
Protective Yin is darkness and evasion, the motion of air and water.
Protective Yang is strength and healing, often represented as banked steady fire or steel.
even if it were taking place earlier, yeah, it'd be fine for an instructor to be old. Fighters is where it gets weird, outside of magical settings.Is it okay that the new good guy mentor would be in his late 70's, early 80's and the MC being in his 50's? Considering this story will take place somewhere in the 2030's-40's.
depends on how much younger, there are rules in a lot of fighting organizations. You could probably get those waved believably if a couple of medical exams proved him fit to take a beating; which the magical aspect should take care of pretty well.Is this entire premise plausible enough that a 50 something year old MC would be taking on younger fighters in matches?
can't see any problems with that.And is it plausible enough that the good guy old mentor was a hippie teen/kid in the 1960's, where he ended up in Japan, where he met his master who was Japanese?