Learning numbers and counting in Japanese is simplified because the Japanese number system is quite logical. The entire number system is based on counting the number of tens and then adding the ones. For example, 11 is jū-ichi, which is 10 (jū) plus 1 (ichi). 21 is ni-jū-ichi, which is 2 (ni) times 10 (jū) plus 1 (ichi).

When you're counting numbers in order, you'll use this pronunciation.

 ichi 1 ni 2 san 3 shi or yon 4 go 5 roku 6 shichi or nana 7 hachi 8 kyû 9 jû 10 jûichi 11 jûni 12 jûsan 13 jûshi or jûyon 14 jûgo 15 jûroku 16 jûshichi or jûnana 17 jûhachi 18 jûkyû or jûku 19 nijû 20 nijûichi 21 nijûni 22 nijûsan 23 sanjû 30 sanjûichi 31 sanjûni 32 yonjû 40 gojû 50 rokujû 60 nanajû 70 hachijû 80 kyûjû 90 kyûjûkyû 99

Counting larger numbers is just a question of adding the number of hundreds, thousands, and so on, in front of the same patterns as for numbers 1-99. For example, the number 150 is pronounced as hyakugoju, which is 1 hyaku plus 50 (gojū).

 100 hyaku 101 hyakuichi 102 hyakuni 150 hyakugoju 500 gohyaku 999 kyû-hyaku-kyû-jû-kyû 1,000 sen

When the numbers are followed by a suffix, such as ji (o'clock) and mai (sheets of), the numbers might be read differently.