Official Web Site
There are parking and restroom.
Admission: 300 JPY for Adult, 100 JPY for under high school.
Time: 9:00 to 17:00 (last entry 16:30)
Closed on Thursday (when Thursday is a holiday, closed on the next day.)
0. at Toyohashi Station.
1. use Meitetsu Line to Higashi Okazaki Station (22 min.)
2. use Meitetsu Bus to Korankei (70 min.)