There are variations and exceptions in Japanese counting, all that can be understood by studying the Japanese language.
But first you need to master 1 to 10, the way we do it in the Dojo. That is shown below.
The Dojo way (1 to 10) is also on video. This will help you with the pronunciation. Click the link below.
Counting 1 to 10 in the Dojo
1 = Ichi
2 = Ni
3 = San
4 = Shi
5 = Go
6 = Roku
7 = Shichi
8 = Hachi
9 = Ku
10 = Ju
Counting 1 to 10 in the Dojo >
Count 1 to 10