🗺️ Blue Cave (Otaru City, Hokkaido)青の洞窟

The so-called "Blue Cave" is a natural art wonder created when sunlight passes through the cave and illuminates the seabed. Among the seven colors of sunlight, all except blue are absorbed by the sea, resulting in a beautiful blue glow on the surface. This phenomenon occurs under various conditions such as water clarity, topography, and light angles. While the world-renowned Blue Cave is located on the island of Capri in Italy, there are also several Blue Caves in Japan. One notable cave is located within the Niseko Shakotan Otaru Coast National Park, which is worth visiting while sightseeing in Otaru. The cave is situated along the coastline, with a wide entrance. Visitors can participate in boat tours operated by various companies and directly enter the cave by boat. Departure points include Otaru Port, Shioya Port, and Iwaki Port, among others. There are many types of boats available, including glass-bottom boats that allow you to view the underwater scenery directly, powerful yachts, and canoes, so you can choose according to your preference. If you enjoy water activities, consider adding sea kayaking or stand-up paddleboarding (SUP) to your itinerary, selecting the best options based on various conditions. Additionally, the unique rock formations and cliffs near the cave are also not to be missed.

Caves located along the Otaru coastline. You can see the dazzling beautiful blue light formed on the water's surface under the complex overlapping conditions. There are several tour boat operators in the area. In addition to the caves, there are also various scenic spots nearby, such as strange rocks and formations.