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Counting Letters

Japanese Counter for Letters (通) – Counting Mail and Letters

Learn how to count letters, messages, or mail in Japanese using 通

Counting Letters in Japanese

In Japanese, letters, mail, documents, notices, and messages are commonly counted with the counter 「通」.

This counter is often used for things like letters, emails, messages, postcards, formal notices, and official documents.

Important Reading Pattern
The counter has some sound changes, so learners should pay attention to pronunciation.

Examples:
1通 (いっつう / ittsuu)
3通 (さんつう / santsuu)
6通 (ろくつう / rokutsuu)
8通 (はっつう / hattsuu)
10通 (じゅっつう / juttsuu)

Common Usage
手紙を一通送りました。 (tegami o ittsuu okurimashita)
Meaning: I sent one letter.

メールを二通受け取りました。 (meeru o nitsuu uketorimashita)
Meaning: I received two emails.

Important Notes
This counter is useful not only for physical letters, but also for written communication such as emails and messages in many contexts.

This category focuses on the most useful and natural learner-friendly readings for counting letters and mail.
1
一通
Hiragana
いっつう
Romaji
ittsuu
Meaning
one letter / one message
Description
This uses a sound change and must be memorized.
2
二通
Hiragana
につう
Romaji
nitsuu
Meaning
two letters
Description
A regular reading used for two letters, emails, or documents.
3
三通
Hiragana
さんつう
Romaji
santsuu
Meaning
three letters
4
四通
Hiragana
よんつう / しつう
Romaji
yontsuu / shitsuu
Meaning
four letters
Description
よんつう is the standard learner-friendly reading. しつう may also be heard.
5
五通
Hiragana
ごつう
Romaji
gotsuu
Meaning
five letters
6
六通
Hiragana
ろくつう
Romaji
rokutsuu
Meaning
six letters
7
七通
Hiragana
ななつう / しちつう
Romaji
nanatsuu / shichitsuu
Meaning
seven letters
Description
ななつう is very common and easier for learners. しちつう is also possible.
8
八通
Hiragana
はっつう / はちつう
Romaji
hattsuu / hachitsuu
Meaning
eight letters
Description
はっつう is the standard reading. はちつう may appear in careful speech, but learners should remember はっつう.
9
九通
Hiragana
きゅうつう
Romaji
kyuutsuu
Meaning
nine letters
Description
きゅうつう is the standard reading.
10
十通
Hiragana
じゅっつう / じっつう
Romaji
juttsuu / jittsuu
Meaning
ten letters
Description
じゅっつう is very common. じっつう is also heard. Both are acceptable.
11
十一通
Hiragana
じゅういっつう
Romaji
juuittsuu
Meaning
eleven letters
Description
This follows the same sound pattern as 1通, so it becomes いっつう.
12
十二通
Hiragana
じゅうにつう
Romaji
juunitsuu
Meaning
twelve letters
13
十三通
Hiragana
じゅうさんつう
Romaji
juusantsuu
Meaning
thirteen letters
14
十四通
Hiragana
じゅうよんつう / じゅうしつう
Romaji
juuyontsuu / juushitsuu
Meaning
fourteen letters
Description
じゅうよんつう is more common and recommended for learners. じゅうしつう may also be heard.
15
十五通
Hiragana
じゅうごつう
Romaji
juugotsuu
Meaning
fifteen letters
16
十六通
Hiragana
じゅうろくつう
Romaji
juurokutsuu
Meaning
sixteen letters
17
十七通
Hiragana
じゅうななつう / じゅうしちつう
Romaji
juunanatsuu / juushichitsuu
Meaning
seventeen letters
Description
じゅうななつう is very common and easier for learners. じゅうしちつう is also possible.
18
十八通
Hiragana
じゅうはっつう / じゅうはちつう
Romaji
juuhattsuu / juuhachitsuu
Meaning
eighteen letters
Description
じゅうはっつう is the standard reading. じゅうはちつう may appear in careful speech, but learners should remember じゅうはっつう.
19
十九通
Hiragana
じゅうきゅうつう
Romaji
juukyuutsuu
Meaning
nineteen letters
20
二十通
Hiragana
にじゅっつう / にじっつう
Romaji
nijuttsuu / nijittsuu
Meaning
twenty letters
Description
にじゅっつう is very common. にじっつう is also heard. Both are acceptable.

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