U+3220 "㈠" Parenthesized Ideograph One Unicode Character

U+3220 "㈠" Parenthesized Ideograph One is a CJK (Chinese, Japanese, and Korean) enclosed ideograph representing the number one, used within an enclosing parenthesis. It is part of a set of characters designed for compatibility with East Asian legacy encoding standards, where numbers are often written in a highly formal or stylized manner, particularly in contexts like lists, outlines, or legal documents. The symbol visually combines the ideograph for "one" (一) inside curved parentheses, distinguishing it from simpler numeral representations and allowing it to be treated as a single unified glyph for precise typesetting.