car:
4km from Joshinetsu Expressway/Yoshii IC
Immediately after exiting the toll gate at Yoshii IC, there is a traffic light where you need to turn left.
After about 500m you will see a sign to turn left, so turn left there. After about 1km you will come to a T-junction, so turn left.
Follow the road and the course will be on your right.

train:
JR Joetsu Shinkansen, Takasaki Station

taxi:
About 20 minutes from Takasaki Station, approx. 3,200 yen