Ibaraki Central Circuit is an a large asphalted area which is used for gymkhana activities. Two gymkhana layouts are used, course A and course B.
Joining such a gymkhana event is basically a full day activity which starts at 8:30 and ends at 15:30. Price is 9000 Yen which includes a lunchbox. Driving time is approximately 5 hours but of course it is a rotation based event and actual driving time depends on the amount of participants.
To attract women and AT vehicles, a discounted price is set. And because the location is close to urban area, a 1000 Yen discount is also given to cars with genuine muffler. The facility is near a bus stop so it is easy accessible by bus from Ishioka Station.
A link to the website can be found below:
http://clear.la.coocan.jp/index.htm
And a link to the location on Google Maps: