In English, if we're tallying something on a piece of paper, etc., we usually write a vertical line to count 1, and then when you reach four of them, you cross it with a horizontal line to mean 5, and repeat. I saw a Japanese paper that seemed to be a similar concept, but the kanji 一 seemed to be used for 1, and the kanji 正 seemed to be used for 5 (there weren't any other numbers shown). What's the whole system in Japanese?
The conventional Japanese tally follows the stroke order for 正. So if the total were 8, it'd look like [正下], and if it were 20, it'd be [正正正正]
This link shows an animation for the stroke order: http://kakijun.jp/page/sei200.html