numeric
The number seven, used for counting objects with the native Japanese counter つ.
机の上にりんごが七つある。
There are seven apples on the desk.
noun
seven years old
Specifically refers to the age of seven, often in contexts like traditional celebrations (e.g., Shichi-Go-San).
My daughter will be seven this year.
noun
four o'clock (old time system)
In the old Japanese temporal hour system, 七つ corresponded to the modern hour of around 4 a.m. or 4 p.m. Rare outside historical contexts.
江戸時代には、明け七つが午前四時ごろを指した。
In the Edo period, 'ake nanatsu' referred to around 4 a.m.