Numbers in Japanese 日本語の数字
The Japanese numerals are the number names used in Japanese. In writing, they are the same as the Chinese numerals, and the grouping of large numbers follows the Chinese tradition of grouping by 10,000. Two pronunciations are used: the Sino-Japanese (on'yomi) readings of the Chinese characters and the Japanese yamato kotoba (native words, kun'yomi readings).
There are 2 important ways of writing the numbers in Japanese: in Arabic numerals (1, 2, 3) or in Chinese numerals (一, 二, 三). The Arabic numerals are certainly more often used in horizontal writing, and the Chinese numerals are more common in vertical writing.
0 零 / 〇