が ぎ ぐ げ ご
Does anybody know there are two kinds of pronunciations for が ぎ ぐ げ ご. Anybody knows that those can be pronounced as [ga gi gu ge go].
Not so many people know you can also pronounce those as [ŋa ŋi ŋu ŋe ŋo].
The way to tell the difference is easy.
1, if the character is in the first part of the word, you pronounce as [ga gi gu ge go].
2, if the character is not in the first part of the word, it is [ŋa ŋi ŋu ŋe ŋo].
You can ask Japanese about that. But if they did not know about this, which does not mean that does not exist. Normally if you want to become a Japanese announcer, you’d better practise those.