agano Prefecture (長野県 Nagano-ken?) is a prefecture of Japan located in the Chūbu region of the island of Honshū. The capital is the city of Nagano.
Within hours after a major earthquake and resulting tsunami hit northeastern Japan near Sendai, a 6.6 magnitude earthquake hit Nagano Prefecture on Saturday, March 12, 2011 at 3:59am local time. There were no reports of damage or casualties as yet, but news is still developing.