In 2024, US police shot and killed 1,173 people [1]. That's 0.35 deaths per 100,000 Americans.
In 2022, Japan had 289 homicides, or 0.23 per 100,000 people [2].
I.e., an American is more likely to be shot by police than a Japanese person is likely to be killed by a murderer.
I don't speak Japanese, but if "police brutality" does not translate into Japanese, then maybe that's because such a thing is unthinkable in Japan.
[1] https://www.statista.com/statistics/585152/people-shot-to-de...
[2] https://en.wikipedia.org/wiki/List_of_countries_by_intention...