I don't know if I'd agree with that. Compare Japan to Western cities. And to Second-World cities. It's obvious they are more intelligent and self-controlled that other racial groups.
Look at their industrial products, over the years. They didn't participate in the creation of motor transportation - but, coming in very late, the REVOLUTIONIZED it. Not with breakthrough ideas, but with Continuous Quality Improvement. No other cluster of companies - no other CULTURE - has been able to do that.
Volkswagen, in early years, approached that level of quality, but once successful, quickly abandoned it. American companies got into that race in the 1980s, and showed improvement (never were they a challenge) but now they've abandoned it in favor of Planned Obsolescence and customer exploitation.
Now, Japan - which has failed its most-vital issue, population-replenishment - Japan is aging out. They adopted DEI wholeheartedly, insofar as promoting women ahead of men. Now they have an army of highly-paid young women, and a basement cadre of young men unable to get work, or start a family, or move away from their parents' homes.
That, and of course, the mind-poisoning Jab. It's no secret why, in the space of seven years, Toyota's quality has fallen so fast. Nissan is ahead of them on that, allowing itself to become a subsidiary of a French maker of ultra-low-quality cars...who were uninterested in Nissan's past history of quality product, instead, looking for fast returns on their investment in the company.
Now, statistically, the Japanese mean IQ may only be a little higher than that of Caucasians - but that little-bit matters. Stefan Molyneaux, before he was gagged and Cancelled, argued that for Western society to continue to function into the future, the population needed to have an average IQ of about 95 or higher. He pointed out how Mexico, which has mean scores around 93...Mexico keeps on starting to succeed and then slumping back into legal and economic chaos. That's not accidental and that's not the result of lack of jobs or USAID monies.
It's the result of their being almost, but not-quite, good enough.