1.
five (things)
The native Japanese counter for five objects.
五つ is the native Japanese (やまとことば) number for five, used when counting general objects without a specific counter.
NATIVE COUNTING SERIES (1-10):
USAGE:
This series is used for counting general objects, abstract things, and when no specific counter applies. It only goes up to 10 — beyond that, use Sino-Japanese numbers with appropriate counters.
AGE:
Also used for age: 五つ means "five years old" (for young children). This usage is common in casual/family contexts.