Crab Spider (Thomisidae), similar one here labeled as a Thomisus sp.. Looking further into it might be Thomisus okinawensis, it looks similar to to fig. 328 on pg. 530 of “Ono, 2009a” although the eye tubercles on yours are a bit more pronounced … I can’t read the description though, I tried cutting and pasting the text into google translate but it didn’t work. I see a bunch of other species in the genus listed for neighboring countries, I probably shouldn’t rule those out.
You can take a photo of text instead of cutting and pasting for Google Translate. I take pics of text on my iPad’s screen with my phone while I have the translate app open on the phone.
We did that too. It was an improvement but still gibberish.