U+FF3F FULLWIDTH LOW LINE

The Unicode character U+FF3F, officially named FULLWIDTH LOW LINE, was introduced in Unicode version 1.1. It is part of the Half And Full Forms block, which belongs to the Basic Multilingual plane. Previously, it was also referred to as FULLWIDTH SPACING UNDERSCORE.

Categorized technically as a Connector Punctuation, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is Unknown and has fullwidth in East Asian typography. When placed in bidirectional text, it behaves as an Other Neutral character. Its visual representation remains not mirrored regardless of the reading direction.