Noun
dakuten (plural dakuten)
A diacritic (゛) used with Japanese kana to mark a consonant as voiced.
Synonyms: tenten, (colloquial) nigori
By adding a dakuten marker ( ゛), a voiceless consonant is turned into a voiced consonant: k→g, ts/s→z, t→d, h→b and ch/sh→j. Source: Internet
For compound words where the dakuten reflects rendaku voicing, the original hiragana is used. Source: Internet
Hiragana with dakuten or handakuten follow the gojūon kana without them, with the yōon kana following. Source: Internet
If the first two syllables of a word consist of one syllable without a dakuten and the same syllable with a dakuten, the same hiragana is used to write the sounds. Source: Internet
In this scheme, diacritics (dakuten and handakuten) are separate characters. Source: Internet
Katakana with dakuten or handakuten follow the gojūon kana without them. Source: Internet