
Guida
The Shimizudake Observatory is a premier viewing spot located in Osoza Town, in the northwestern part of Sasebo City, Nagasaki Prefecture. Situated within the Saikai National Park, it offers a magnificent view of the Kujukushima (Ninety-nine Islands) seascape. From this vantage point, visitors can enjoy a panoramic view of the northern Kujukushima islands and even see the distant landscapes of Hirado. The area is renowned for its rich natural environment and the changing beauty of the seasons.
This area is part of the Saikai National Park, where the stunning natural scenery has been preserved for generations. The Kujukushima archipelago itself consists of a high density of islands, with 208 islands of various sizes scattered throughout the sea. This unique topography creates a landscape of unparalleled beauty found in very few places in the world. The natural environment surrounding Shimizudake serves as a vital and precious cultural and natural resource for the region.

The greatest draw is the panoramic vista of the Kujukushima islands stretching out before you. The contrast between the deep blue sea and the various islands creates a mesmerizing sight for all visitors. The scenery is particularly spectacular during the spring season, when the surrounding hills are covered in blooming azaleas, adding vibrant splashes of color to the lush green landscape. The wide, open view extending toward Hirado provides a profound sense of freedom and openness.
The best time to visit is around April. During this month, the azaleas reach their peak bloom, adding a beautiful layer of color to the landscape. The view changes significantly depending on the time of day: during the bright daylight hours, the shapes of the islands and the clarity of the blue sea are most vivid, while the evening hours offer a more dramatic and cinematic atmosphere.

The primary activity at the observatory is sightseeing and enjoying the natural beauty of Kujukushima. It is an ideal stop during a scenic drive, allowing you to admire the archipelago from your car or while standing at the lookout. It is a popular spot for travelers looking to refresh themselves in nature or for photography enthusiasts seeking the perfect shot.
There are several other famous viewing spots scattered around the area. For example, Nagakurayama Park is a well-known spot for azalea viewing and also features camping grounds and open spaces. Other nearby locations, such as Ishidake Observatory and Yumihariyama Observatory, offer different perspectives of the Kujukushima islands. These locations are officially recognized as part of the 'Kujukushima Eight Views.'
Access to the observatory is most convenient by car. As it is a natural area, we recommend wearing comfortable walking shoes and clothing suitable for light outdoor activities. Depending on the season, you may want to dress appropriately for a light stroll to enjoy the flowers.