Earlier quoted context omitted.
Japan is also one of the least diverse developed countries with well over 90% of inhabitants being Yamato Japanese. It is unsurprising that it would be safe, clean, and functional.
It's not a race thing, it's a trust and culture thing. There are diverse countries that have similar levels of safety like Singapore. If your government sucks, laws are poorly enforced or even maliciously enforced - there is low trust among the people, no respect for public spaces and no one follows the social norms.
Chiang Mai in Thailand also seemed safe and trustworthy when I was there a few months ago: eg the locals casually left stuff outside and on their motorbikes, petty theft of unattended items seems to be no problem.
Our neighbour Malaysia seems to have more problems with these issues. Looking into the causes of the differences between countries would be interesting. I suspect in Singapore our development is at least partially the result of deliberate social engineering by LKY.
I can also tell you that after 40 years of 'actually existing socialism' vs 'social market economy', that East Germany had markedly lower trust and safety than West Germany. And the wounds still haven't healed. Switzerland has even higher trust.
You can see similar gaps in Taiwan/Hong Kong vs mainland China.