Dakuten and handakuten is Japanese marker that indicates how to pronounce the alphabet.
Dakuten on the right corner of Ka pronounced as Ga.
As same
ぎ Pronounced as Gi
ぐ pronounced as Gu
げ pronounced as Ge
ご Pronounced as Go
Dakuten on the right corner of さ, sa pronounced as ざ za.
As same
じ Ji
ず Ju
ぜ Je
ぞ Jo
For the use of dakuten T pronounced as d
た ta become だ da


