numeric
The native Japanese numeral for six, used for counting general objects, ages, and in the old time system.
机の上にりんごが六つある。
There are six apples on the desk.
娘は今年で六つになります。
My daughter will be six years old this year.
noun
Refers to the sixth hour in the traditional Japanese temporal system, roughly corresponding to dawn or dusk depending on the season. Now largely historical.
江戸時代には、明け六つに門が開いた。
In the Edo period, the gates opened at the sixth hour of dawn.