May 29, 2022

Shikoku (Japanese: 四国) is one of the major islands that make up the Japanese archipelago. Shikoku is the smallest of the four main islands of mainland Japan. Awa, Sanuki, Iyo, excluding Kii and Awaji, among the Nankai provinces of Kokishichido (伊予國) · The four districts of Tosa Province (土佐国) were located there, and after the modern era, it was called 'Shikoku', meaning that there were four districts. Today, it consists of four prefectures: Tokushima Prefecture, Kagawa Prefecture, Ehime Prefecture, and Kochi Prefecture. Shikoku mainland and annexed islands are combined to form the “Shikoku region”. When the word 'Shikoku' is used, it usually means the Shikoku region, so it is sometimes called 'Shikoku Island' for convenience. Of the four prefectures that make up the Shikoku region, Tokushima Prefecture, Kagawa Prefecture, and Ehime Prefecture have many exchanges with the Sanyo region. Tokushima Prefecture in the east is influenced by the Kinki region in terms of politics, economy, and culture, Kagawa Prefecture in the northeast has a deep connection with Okayama Prefecture in both cultural and economic aspects, and Ehime Prefecture in the northwest is connected to Hiroshima Prefecture and Oita Prefecture in Kyushu. There are many exchanges of


With the birth of the Japanese archipelago about 19,000,000 years ago, the predecessor of Shikoku was born. It was surrounded by three mainland areas, Kinki, Sanyo, and Kyushu, across the Seto Inland Sea. In the central part of the island, the Shikoku Mountains and the Sanuki Mountains rise like the natural boundaries of each prefecture. The Chuo rescue boat runs east and west across the Sadamisaki Peninsula from the north of the Yoshino River. The highest point on the island is Mt. Tengu (天狗岳, Ehime Prefecture) on Mt. Ishizuchi. It is the 49th largest island in the world, excluding continents.


Kitashikoku (Northern Shikoku)

Some areas of Tokushima Prefecture, the entire Kagawa Prefecture, and areas facing the Seto Inland Sea, such as the eastern part of Ehime Prefecture, have a Onnandau climate belonging to the Seto Inland Sea climate. Because there is little damage from typhoons, cultivation of olives and tangerines is prosperous, but there are few large-scale rivers, so there are not many water resources.

Minami Shikoku

Almost all of Tokushima Prefecture, southern Ehime Prefecture, and areas facing the Pacific Ocean, such as Kochi Prefecture, belong to the Pacific side climate. It is warm under the influence of the Kuroshio Current that flows through the Pacific Ocean, and because spring arrives early, the first declaration of cherry blossoms on the mainland is often around Kochi Prefecture, making this area a popular place for facilitating cultivation or as a campground for professional baseball teams. Industries and events that take advantage of the climate develop. The forestry industry is prosperous due to the large amount of precipitation.

Climate throughout

Although Shikoku does not extend from 32 degrees north latitude to 34 degrees north latitude, the temperature difference is quite large. The highest temperature is 41.2 degrees Celsius, the highest temperature in Japan, and the lowest temperature is -8 degrees Celsius, similar to parts of Hokkaido. It has a warm and humid climate.



Since Shikoku is located to the southwest of Kinai, in Kokishichido, it was included in the South Sea along with Nanki and Awaji Island. Dogo Onsen in Iyonokuni, located in the northwestern part of Shikoku, where we met at the midpoint of the Kinki-Kyushu route, contains records of the bathing of Emperors Jomei and Saimei (Nihon Shoki), as well as records of writers' bathing (来浴記録 (Manyopjip) is also available.