You've read the other writeups and now think you can count in Japanese? <amused chuckle>
One of the more annoying features of the Japanese language is that they use variable counting suffixes for different things. While based on the above Chinese origin numbers, the suffix changes according to what you are counting. Some examples:
To count the floors of a building, you use kai:
To count people, you use nin, but the first two are irregular:
To count flat things, such as pieces of paper, you use mai:
To count large machines, you use dai:
To count steps, you use ho:
There are dozens of these suffixes. Students of Japanese have a lot of fun memorizing them...