This is a Japanese symbol, which surrounds a Japanese character with a square frame, which looks a bit like the Chinese word "pointing".
This character means that the finger or toe points in a certain direction, which means that someone or something can be kept, which means "approved".
In the emoji of most platforms, the border of the logo is green; Only a few platforms depict gray borders. As for the color of characters, most platforms use white, and some platforms use black or green. In addition, the fonts of characters are also varied, both formal and traditional, and also relatively personalized.
