13 in Japanese
Nearby Japanese Numbers
13 in Other Languages
About 13 in Japanese
The number 13 in Japanese is 十三 (jū san). The ordinal form — used for rankings, dates, and sequences — is 十余り三つ (tō amari mittsu). The native counting form is 十余り三つ (tō amari mittsu).
The number 13 is odd — and also prime, meaning it has exactly two factors. Knowing how to say 13 in Japanese is useful in everyday situations such as prices, addresses, ages, dates, phone numbers, and telling the time.
Knowing 13 in Japanese is more useful than it might seem. Numbers are woven into nearly every type of conversation, and fluency with them makes everything from shopping to socializing dramatically easier.
Learning Numbers in Japanese
What makes Japanese numbers challenging
Two parallel number systems (Sino-Japanese and native Japanese) that must be used in the right contexts. Counter words (classifiers) are mandatory — different objects require different counters based on shape, size, and category. The digits 4 and 7 each have two readings (shi/yon, shichi/nana) with strong cultural preferences: shi (4) sounds like death and is avoided. Large numbers are grouped by 10,000 (man) not 1,000, requiring mental re-grouping for English speakers. Sound changes (rendaku) alter some numbers when combined with counters.
Tips for learning Japanese numbers
Learn Sino-Japanese numbers first — they cover most situations including phone numbers, prices, dates, and math. Always use yon (not shi) for 4 and nana (not shichi) for 7 in everyday counting. Master the man (10,000) unit early for large numbers. Start with the general-purpose counter -tsu for objects before learning specific counters. Practice with Japanese prices (yen amounts are always large numbers since there are no decimal coins) for excellent real-world number comprehension.