>>17811779
A) The biggest sect of Buddhism in Japan is Pure Land, which is antithetical to everything OP has said
B) Buddhism in Japan is super-syncretized with Shinto
C) And even then, Japan is really most religiously disbelieving. Look at the details of what Pew saya about religion in Japan at https://www.pewresearch.org/wp-content/uploads/sites/7/2017/11/Religion20171117.pdf

"The number of religious groups in Japan:
Shinto followers: 89.5 million (70.4% of the total population)
Buddhists: 88.7 million (69.8%)
Christians: 1.9 million (1.5%)
Other religions: 8.9 million (6.9%)
Total: 188.9 million (1.49 times of population)
Japanese population:127.1 million
On the other hand, the Japanese National Character Survey in 2013:
72.0% do not have any personal religious faith
The Japanese General Social Survey in 2015:
68.6% do not follow any religion".

Japan is a country with a lot of Buddhist influence but describing it as a "Buddhist country", especially the sort of Buddhism OP is talking about, doesn't work.

>The effect of religion by itself on quality of life is limited.
And Buddhism also won't improve your afterlife. So it helps neither life nor afterlife. Buddha - or at least what centuries of unwritten oral tradition had him saying - was wrong.