On Platform No.0 at JR Takasaki Station, take Joshin Dentetsu Railway.
Takasaki Station to Sendaira Station (55 min)
Joshin Dentetsu Railway Homepage (Japanese)
Sendaira Station
Approximately 35 minutes from Usui-Karuizawa IC, or about 5 minutes from Shimonita IC.
Exit at the Saku IC, take National Route 254 toward Shimonita/Tomioka, about 60 minutes.
From JR Takasaki Station, take the Joshin Dentetsu Railway from Platform 0 (approx. 50 minutes). Get off at Sendaira Station, then walk about 12 minutes.
For detailed timetables and fare information, please refer to the official schedule.