Shikoku is the smallest and least populous of Japan's four main islands, located to the south of the main Honshu island. It's known for its natural beauty, historical sites, and spiritual significance. Shikoku offers a more tranquil and traditional side of Japan, making it a unique destination for those looking to experience nature, spirituality, and local culture. It had a population of 3.8 million in 2015.

Matsuyama Castle or Matsuyama-jō is a historic and picturesque castle located in Matsuyama City, Ehime Prefecture, Japan. Perched on Mount Katsuyama, the castle is known for its commanding hilltop location, stunning views of the city and surrounding landscapes, and its well-preserved Edo-period architecture.