Quick Reference

Meaning & Definition

Itsutsu is the number five that lives in the little counting song every Japanese learner memorizes: hitotsu, futatsu, mittsu, yottsu, itsutsu. It’s the moment the pattern breaks its rhythm, and getting comfortable with it means the whole native-count series finally clicks.

五つ (itsutsu) is the native Japanese (wago) way to count five of something general — five apples on a table, five chairs, five small toys. It belongs to the tsu-counter series that runs hitotsu (one), futatsu (two), mittsu (three), yottsu (four), itsutsu (five), all the way to kokonotsu (nine), before switching to 十 (too) for ten. Itsutsu is also traditionally used for a child’s age — itsutsu can mean (five years old), the way mittsu and yottsu are used for very young children before switching to the -sai counter. In a shop, pointing at a bin of mikan and saying 五つください (itsutsu kudasai) — (five, please) — works even if you don’t know the specific counter for citrus. This contrasts with the Sino-Japanese route: 五個 (goko) uses the general counter ko with the number go, and specific counters like 五本 (gohon) for long thin objects follow the same go+counter pattern. The tsu-series word for five, itsutsu, stands apart because it doesn’t use go at all — it’s its own native word. One more common sighting: 五つ星 (itsutsu-boshi), meaning (five-star), as in a five-star hotel or a five-star review.

How to Use It

The biggest practical use of itsutsu is as a safety net: when you’re not sure which specific counter an object takes (is it hon, mai, ko, hiki…?), the native tsu-counter almost always works as a fallback for countable objects, and itsutsu covers five of them. Watch the reading carefully — itsutsu doesn’t follow the pattern you’d expect from ichi (one) the way futatsu loosely echoes futa-; it’s an irregular form worth drilling on its own, alongside yottsu (four), which is also irregular. Don’t confuse 五つ (itsutsu), the counter, with 五個 (goko) or 五本 (gohon) — those use the number go plus a specific counter, and mixing the two systems (like saying go-tsu) isn’t natural Japanese. Remember that itsutsu-boshi (five-star) is a fixed, very common phrase worth learning as a chunk. Finally, remember the series has a ceiling: after kokonotsu (nine), it jumps to 十 (too), and from eleven onward Japanese switches entirely to number+counter combinations like juu-ichi-ko.

Example Sentences

Cultural Context

For most Japanese learners, memorizing hitotsu through too (one through ten, native style) is a rite of passage distinct from learning to count 1-2-3 in the Sino-Japanese system taught first. Japanese children learn this native tsu-series early too, often through call-and-response counting songs, because it’s the count used for everyday objects at home long before school introduces the specific counters for pencils, sheets of paper, or long thin things.

The irregular readings inside the series — especially yottsu (four) and itsutsu (five), which don’t map cleanly onto the numbers yon and go — are exactly why the series gets drilled as a fixed chant rather than derived logically. Outside of pure counting, itsutsu survives most visibly in 五つ星 (itsutsu-boshi), the everyday way to say (five-star) for hotels, restaurants, and app reviews, keeping this old native number alive in thoroughly modern contexts.

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