Single Numbers
Single Numbers
Basic counting in Japanese is easy! All you have to do is remember the following list of numbers, a few rules, and you're on the way.
 
 Number   Romanized Reading   Japanese Writing 
0 rei, maru, zero れい, まる, ゼロ
1 ichi いち
2 ni
3 san さん
4 shi, yon し, よん
5 go
6 roku ろく
7 shichi, nana しち, なな
8 hachi はち
9 ku, kyuu く, きゅう
10 juu じゅう

The Counting Units
B-2. The teens
To form numbers from 11 to 19, start with juu (10) and place the additional number you need directly after it. It is much like counting with roman numerals.

Hundreds Table (100-900)
  Number     Romanized Reading   Japanese Writing
11 juu ichi じゅういち
12 juu ni じゅうに
13 juu san じゅうさん
14 juu yon, juu shi じゅうよん, じゅうし
15 juu go じゅうご
16 juu roku じゅうろく
17 juu nana, juu shichi じゅうなな, じゅうしち
18 juu hachi じゅうはち
19 juu kyuu, juu ku じゅうきゅう, じゅうく

The hundreds and thousands
With hyaku (hundreds) and sen (thousands), the pattern is basically the same, but there are some variations. The variations are marked with ☆

 
  Number   Romanized Reading   Japanese Writing  
100 hyaku ひゃく
200 ni hyaku にひゃく
300 san byaku (never "san hyaku") さんびゃく
400 yon hyaku (never "shi hyaku") よんひゃく
500 go hyaku ごひゃく
600 roppyaku (never "roku hyaku") ろっぴゃく
700 nana hyaku (never "shichi hyaku") ななひゃく
800 happyaku (never "hachi hyaku") はっぴゃく
900 kyuu hyaku (never "ku hyaku") きゅうひゃく

Thousands Table (1000-9000)
  Number   Romanized Reading   Japanese Writing  
1,000 sen, issen せん, いっせん
2,000 ni sen にせん
3,000 san zen (never "san sen") さんぜん
4,000 yon sen (never "shi sen") よんせん
5,000 go sen ごせん
6,000 roku sen ろくせん
7,000 nana sen (never "shichi sen") ななせん
8,000 hassen (never "hachi sen") はっせん
9,000 kyuu sen (never "ku sen") きゅうせん