I went to a city pool (Higashi-chofu-koen pool) with my son. Its entrance fee is 360 yen ($3.71 €2.77) for one day use. Kids price is 100 yen. There is no time limitation to use the pool within a day. It means you can stay at the pool from 9:30 to around 18:00 with the 360 yen ticket. There is a hotdog stand on the poolside. You can buy a hotdog and eat it on the poolside.
The pool located near my house has a 25m long pool, and it is common size of pool in schools. But Higashi-chofu-koen pool has 50m long pool. My son tested himself if he can swim 50m long.
Today's temperature is 30.4 C.