Shimane prefecture, together with Tottori prefecture is known as the Sanin region, meaning "the shady side of the mountains". There is a mountain range separating these two prefectures from Hiroshima and Okayama, which means that the weather here is drastically wetter than further to the south.
a JR train line originating in Yamaguchi (Local) or Shin-Yamaguchi (Super Okii) stops at a number of points in Shimane prefecture.
There are no common entry ways into Shimane via boat. However, if you are traveling from South Korea to Shimane, the cheapest way would be to take a ferry boat from Busan to Shimonoseki (Yamaguchi Prefecture) and then take a train into Shimane.
The best way to get around Shimane is to drive. Most towns and cities, especially those on the coast, can also reached by train. Buses go pretty much everywhere, but some places may only have a few buses a day.
There are many ski resorts in the prefecture. Most will blow snow when it hasn't fallen, giving a reliable season from late November until late March.
Mizuho Highland is the biggest (10 slopes, 5km longest run) and probably best (the only half-pipe in the region) resort.
The Yabusame (horse-back archery) festivals of Shimane are quite famous, especially that of Tsuwano, which holds the oldest Yabusame range in all of Japan (some 1000+ years old). They usually are held in early April. If one is particularly lucky, the festival will coincide with the cherry blossoms blooming, for the consummate Japanese cultural experience.
During the year there are numerous festivals. Many towns and cities have a fireworks show in August.