U+31F5 KATAKANA LETTER SMALL HA

U+31F5 was added to Unicode in version 3.2 (2002). It belongs to the block Katakana Phonetic Extensions in the Basic Multilingual Plane.

This character is a Other Letter and is mainly used in the Katakana script.

The glyph is not a composition. It has a Wide East Asian Width. In bidirectional context it acts as Left To Right and is not mirrored. In text U+31F5 behaves as Conditional Japanese Starter regarding line breaks. It has type OLetter for sentence and Katakana for word breaks. The Grapheme Cluster Break is Any.

The Wikipedia has the following information about this codepoint:

は, in hiragana, or ハ in katakana, is one of the Japanese kana, each of which represent one mora. Both represent [ha]). They are also used as a grammatical particle (in such cases, they denote [wa], including in the greeting "kon'nichiwa") and serve as the topic marker of the sentence. は originates from 波 and ハ from 八.

In the Sakhalin dialect of the Ainu language, the katakana ハ can be written as small ㇵ to represent a final h sound after an a sound (アㇵ ah). This, along with other extended katakana, was developed by Japanese linguists to represent sounds in Ainu not present in standard Japanese katakana.