U+309B "゛" Katakana-Hiragana Voiced Sound Mark Unicode Character

U+309B "゛" Katakana-Hiragana Voiced Sound Mark is a combining diacritical mark used in the Japanese writing system to indicate that a preceding kana character should be pronounced with a voiced consonant, transforming sounds like "ka" into "ga" or "sa" into "za." It is visually identical to the dakuten, a pair of small strokes resembling quotation marks, and is applied to both hiragana and katakana characters. This mark is distinct from the similar-looking handakuten (U+309C), which instead denotes a semi-voiced sound, such as changing "ha" to "pa."