Code point
U+3323
Glyph appearance depends on your fonts.
U+3323
So<square> 30BB 30F3 30C8U+3323 SQUARE SENTO is a Unicode 16.0.0 character in the Other Symbol category. It belongs to the CJK Compatibility block.
Choose the representation you need, then copy its value.
U+3323
13091
㌣
㌣
E3 8C A3
3323
00003323
%E3%8C%A3
\u3323
\u3323
\u3323
\3323