I think because there are just so many niche hobby in japan, some people concentrate on that niche very closely very meticulously...I agree but tradition being a cultural thing, striving toward perfectionism is something that's been associated with the Japanese tradition for a long time now - Though maybe this could just be romanticizing and generalization.
The fact, however, does remain that the most accurately reproduced leather jacket began appearing in Japan, even though the entire repro thing started off in Europe, during the 80's. Just that where others called it a day, Japan took things a few steps further and that's something that cannot be denied.
but on a wider scale
I remember sony playstation 1, shouldn't that be the pinnacle of console gaming the pride of sony? I have to stand it on its side, put it upside down, to read the disc after some time, and going forward they just sell it as vertical console give it an official stander... almost laughably laziest solution. in anime and manga of course the story of the character is to be the best at what he is doing and with mostly will power and latent talent overcome all the impossible challenges come his way.. I mean Son Goku, Saint Seiya, Naruto, One Punch man... but in real life in sport for example there is very little example how striving for perfection show its result in world stage, compared to china who dominate many sports for years or korean I mean as comparable east asian genetics.
most definitely not in racing their own racing bikes
I don't mean to disrespect japan, but merely observation.