Park:
6 am - 7 pm (February 20 – September 30)
7 am - 6 pm (October 1 - February 19)
Kobuntei:
9 am - 5 pm (February 20 – September 30)
9 am - 4:30 pm (October 1 – February 19)
Closed:
Park: Open every day
Kobuntei: Dec 29 - 31
Park: Free
Kobuntei:
Adults: 200 JPY
Children: 100 JPY
Wikipedia https://en.wikipedia.org/wiki/Kairaku-en
Official Website http://www.koen.pref.ibaraki.jp/park/kairakuen01.html
Address Japan
Coordinates 36°22'30.617" N 140°27'8.742" E