may i know what bus or train from ogizawa station to karuizawa station
To reach Karuizawa Station from Ogizawa Station, first take the Nagano-Ogizawa Express bus from Ogizawa Station to Nagano Station (1 hour and 45 minutes, 2,600 yen). Then take the Hokuriku Shinkansen train from Nagano Station to Karuizawa Station (30 minutes, 3,160 yen). Or, you can take the Shinano Railway line between Nagano and Karuizawa (90 minutes, 1,640 yen).
I hope that helps!