U+1B05A "𛁚" Hentaigana Letter So-4 Unicode Character

U+1B05A "𛁚" Hentaigana Letter So-4 is a historical variant form of the Japanese hiragana character "そ" (so), belonging to the Hentaigana block within the Unicode standard. Hentaigana are obsolete or alternative cursive forms of kana that were commonly used in Japan before the modern orthographic standardization in 1900. This particular glyph, designated as so-4, represents one of several recognized historical ways to write the syllable "so" and is primarily utilized in scholarly texts, digital archiving of premodern Japanese documents, and linguistic research to preserve the historical diversity of written Japanese.