Shimane Prefecture

Shimane Prefecture is located in the San’in region of western Honshu, Japan, with its prefectural capital in Matsue City. Due to its mountainous terrain and limited plains, the prefecture is relatively less industrialized and has a lower population density. However, it possesses a long history and deep cultural heritage, often regarded as one of the birthplaces of Japan’s ancient culture. Historically, Shimane encompassed the old provinces of Izumo, Iwami, and Oki, which today are still commonly referred to as the Izumo Region, Iwami Region, and Oki Region.

The name Shimane originates from Shimane District around Matsue Castle, first recorded in the Izumo Fudoki. The prefecture has an area of about 6,708 km², ranking 19th in size among Japan’s prefectures. It borders Tottori to the east, Hiroshima to the south, Yamaguchi to the west, and faces the Sea of Japan to the north. Forests cover 78.8% of the land, while farmland makes up only about 5.8%. The largest plain is the Izumo Plain, which is also the most populated area. Major rivers include the Gōnokawa, Hii, Takatsu, and Kandogawa Rivers, which are short and fast-flowing, often causing floods.

Shimane has a coastline stretching over 1,000 kilometers. The northern Oki Islands, formed by volcanic activity, consist of four main islands and more than a hundred smaller ones. Known for dramatic coastal formations such as the Kuniga Coast, the area is part of the Daisen-Oki National Park and is designated as a UNESCO Global Geopark.

Population is most concentrated in the Izumo Region, with Matsue City and Izumo City being the largest urban centers. By contrast, Hamada City in the Iwami Region has only about one-third of Izumo’s population, while the Oki Islands are home to roughly 20,000 people.

The climate is classified as Sea of Japan side, but because of Shimane’s relatively southwestern location, it is milder than northern areas. Winters are marked by rain, snow, and cloudy skies under the northwest monsoon, though snowfall is less than in Hokuriku or Tottori. The Iwami region, influenced by the Tsushima Current, rarely sees snow. Summers can be hot, but generally cooler than the San’yō region. Rainfall peaks during the June–July rainy season and the September autumn rain season.

Shimane’s tourism appeal lies in the combination of ancient history and natural beauty.

• The most iconic site is Izumo Taisha in Izumo City, one of Japan’s oldest and most revered shrines, dedicated to Ōkuninushi, the deity of nation-building and relationships. It is said that all the gods of Japan gather here in the tenth lunar month, which is called “Kamiari-zuki” (Month of the Gods) in Izumo, while the rest of Japan calls it “Kannazuki” (Month without Gods). The current honden (main hall), rebuilt in 1744, is designated a National Treasure.

• Matsue City, the prefectural capital, is famous for Matsue Castle, one of Japan’s twelve surviving original castles, designated a National Treasure in 2015. Surrounded by moats, samurai residences, and historic streets, Matsue is often called the “City of Water.” Boat rides along the castle moat highlight its Edo-period charm.

• In the Iwami Region, Iwami Ginzan Silver Mine (World Heritage Site) was once one of East Asia’s most important silver mines. The preserved mining remains and Edo-period merchant townscape of Ōmori offer a vivid sense of history.

Natural landscapes are equally remarkable:

• Mt. Sanbe, an active volcano with expansive grasslands, offers seasonal scenery.

• Tachikue Gorge is known for dramatic cliffs and river valleys, dubbed the “Yabakei of San’in.”

• The Shimane Peninsula coastline showcases the rugged Sea of Japan, with Hinomisaki Lighthouse at the western tip (Japan’s tallest stone lighthouse) and Mihonoseki Lighthouse at the eastern tip.

Hot springs are another highlight:

• Yunotsu Onsen, with many preserved old buildings, is designated an Important Preservation District for Groups of Historic Buildings and is rated top-class for its therapeutic waters.

• Tamatsukuri Onsen, famed for its skin-beautifying properties, has been loved by nobles since ancient times.

The Oki Islands to the north offer a completely different experience, with volcanic cliffs, sea caves, and dramatic coastal scenery such as the Kuniga Coast, Chibu Red Cliff, and Jōdogaura, forming part of the UNESCO Global Geopark.

In summary, Shimane Prefecture is a place where myth, history, and nature intertwine. Whether visiting the sacred Izumo Taisha, strolling the waterways of Matsue, exploring the silver mine heritage, or relaxing in onsen, travelers can deeply experience the unique spirit of this land.