I've updated a blog from a few years ago about the healing power of Shikata ga nai. Although it can be a form of passive resignation, there is also the paradox that accepting what can't be changed releases life energy to what can be changed.
https://www.psychologytoday.com/us/blog/finding-meaning-in-life-s-struggles/201603/the-japanese-art-acceptance-shikata-ga-nai