Quick Reference

Meaning & Definition

Nanatsu is the native Japanese word for seven objects, drawn from the ancient hitotsu, futatsu, mittsu counting series that predates the Sino-Japanese number system. Unlike the borrowed nana or shichi, nanatsu carries the weight of a counting tradition rooted in Old Japanese.

Japanese has two parallel counting systems: the Sino-Japanese series (ichi, ni, san…) and the native Japanese series (hitotsu, futatsu, mittsu, yottsu, itsutsu, muttsu, nanatsu, yattsu, kokonotsu, too). Nanatsu belongs to the native series and is used when counting general objects up to ten without attaching a specific counter suffix. It works for concrete, countable items in everyday speech — seven apples, seven boxes, seven mistakes — where the speaker does not need a specialized counter like -hon (long objects) or -mai (flat sheets). Beyond ten, the native series ends and speakers switch to the Sino-Japanese system. As for the number seven itself, both nana and shichi exist as standalone readings, but nana is strongly preferred in modern spoken Japanese because shichi can be confused with ichi (one) over the phone or in fast speech. Nanatsu, however, is never confused with anything — its full three-mora shape makes it unambiguous in counting contexts.

How to Use It

The most common confusion for learners is choosing between nanatsu, nana, and shichi. Use nanatsu when counting standalone objects without a counter suffix — seven things sitting on a table, seven tasks on a list. Use nana (not shichi) when combining with a counter suffix, as in nana-hon (seven long objects) or nana-mai (seven flat sheets). Avoid shichi in spoken contexts where clarity matters; it survives mainly in fixed phrases like Shichi-Go-San and in formal counting. The native series (nanatsu) also stops at ten — there is no juunatsu for eleven — so switch to juuichi and beyond.

Kanji Breakdown

The kanji 七 means seven and is one of the simplest number characters, written in just two strokes. The つ attached to it is the counter suffix shared by all members of the native Japanese series — hitotsu, futatsu, mittsu and so on through kokonotsu. This -tsu ending is not a separate counter for a specific object type; it is the grammatical marker that signals the entire native counting series. When you see 七つ written in kanji, the combination signals seven general items counted in the traditional Japanese way.

Example Sentences

Cultural Context

The number seven holds a special place in the Japanese ceremonial calendar through Shichi-Go-San (七五三), a milestone rite held each November. Families visit Shinto shrines when their children reach the ages of three, five, and seven — the odd numbers considered auspicious in Chinese-influenced thought that shaped early Japanese culture. The seven in Shichi-Go-San is pronounced shichi rather than nana, preserving the older Sino-Japanese reading in a formal context, while the counting form nanatsu appears in everyday descriptions of a seven-year-old child.

Tanabata (七夕), celebrated on the seventh day of the seventh month, is another occasion where seven is deeply embedded in cultural meaning. The festival marks the one night per year when the star deities Orihime and Hikoboshi are said to meet across the Milky Way. Participants write wishes on strips of paper and hang them from bamboo branches, and the number seven woven into the festival’s name and date gives it a layered resonance that connects the ordinary act of counting to mythology and the night sky.

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