This dive site, Mikuni Takara Island West, is located off Bikuni Port in Shakotan, Hokkaido, Japan. It is a boat-entry site easily accessible within 5-10 minutes. The site is renowned for its strikingly clear “Shakotan blue” waters and features a captivating underwater topography characterized by dynamic columnar joints, intricate crevasses, and exciting tunnels, offering a varied and engaging dive experience. There is no specific historical account provided for the dive site itself, but its name "Treasure Island" suggests its rich natural offerings.
Divers can expect to encounter a diverse range of marine life. Resident species include mebaru, soi, and various sculpins. Migratory visitors like yellowtails and flounders are also seen, with occasional schools of sea tanago adding to the spectacle. The rich rock and coral ecosystems are particularly noteworthy for their abundance of nudibranchs, making it a paradise for macro enthusiasts.
The best time to visit this dive site would likely be during the warmer months when Hokkaido's waters are most inviting. Its shallow depths and fascinating underwater structures, including swim-throughs, make it an excellent choice for both scuba divers and freedivers. Snorkelers will also appreciate the clear waters and vibrant marine life close to the surface, especially around the rock and coral formations. The combination of easy access, good visibility, and unique topography offers a rewarding experience for all.
