Komoro is located in southern Nagano Prefecture: it is therefore easily reachable from the Kantō region!
From Tōkyō, Saitama, Gunma and Nagano, Nagano Shinkansen carries you to Sakudaira Station.
Take the Koumi line and get off at the final stop, Komoro Station.
From central Tokyo it takes less than 2 hours.
For those who come from western Japan, take the ‘Shinano’ limited express departing from Nagoya, heading to Matsumoto-Nagano.
Once the train stops in Kobuchizawa, take the Koumi line to Komoro (from here, about 2 hours).
Kaiko-en is just out of the station!
By the way, the Koumi Line is the highest of the whole country: it reaches the altitude of 1350 meters above the sea level with Nobeyama Station: the view on Yatsu-ga-take is particularly stunning.