Nagano Prefecture
A landlocked prefecture in the Chūbu region of Honshu, known for mountains, hot springs, and the 1998 Winter Olympics.
Nagano Prefecture is surrounded by mountains.
I plan to go skiing in Nagano Prefecture next month.
長野県 is the official modern prefecture name, whereas 信州 is the traditional regional name for roughly the same area, often used for local identity and products.
Compound of 長野 (Nagano, a place name) and 県 (prefecture). The name Nagano itself is of uncertain origin, possibly referring to a long field or plain.