
Guide
Senkakuwan Ageshima Yuen is a premier tourist facility located in Ageshima-kyo within the Sado Quasi-National Park on the northern side of Sado Island, Niigata Prefecture. The area is famous for its dramatic landscape, where steep cliffs meet the vibrant blue sea. Visitors can enjoy the best of both land and sea through various activities, such as riding a glass-bottom boat to observe marine life up close, exploring a modern aquarium enhanced by digital technology, and relaxing at the observation deck with breathtaking views.
This area has long been cherished as a place to experience the rich natural beauty of Sado. As the area has been developed for tourism, it has evolved from a simple scenic spot into a center for environmental education, helping to pass the legacy of Sado's natural wonders to future generations. A unique aspect of this destination is the fusion of tradition and innovation, exemplified by the 'Ageshima Sea Digital Museum,' which integrates modern digital displays with traditional nature observation to create a contemporary way to experience the ocean.

The highlight of your visit will undoubtedly be the 'Glass-Bottom Boat' (Kaichu Toshisen). By looking through the transparent floor of the boat, you can witness the vibrant coral and colorful fish living in the crystal-clear waters. For a modern twist, the renovated 'Ageshima Sea Digital Museum' uses advanced digital technology to provide an immersive look into marine ecosystems. Additionally, the Ageshima Observation Deck offers a stunning panoramic view of the elegant, sweeping coastline of Sado. These spots offer a profound way to connect with the natural abundance of the region.
The facility is open year-round, though operating hours vary by season. During the summer months (May to September), the long daylight hours make it a perfect time for outdoor activities, as the bright sunlight makes the ocean colors appear exceptionally vivid. Spring and autumn are also wonderful times for a peaceful stroll in a mild climate. On certain occasions, the 'Ageshima Light-up' event may occur, allowing visitors to experience the scenery in a mystical, illuminated atmosphere quite different from the daytime.

We highly recommend booking a glass-bottom boat experience to see the world beneath the waves—a view you cannot get from the shore. At the digital aquarium, you can learn about marine biology through interactive displays, and even enjoy unique interactions like the 'Doctor Fish' experience. After your exploration, take a break at the 'Ageshima Sea Cafe,' where you can sip a drink while gazing out at the magnificent ocean scenery.
The surrounding area is dotted with landmarks that symbolize Sado's natural beauty, such as the Oosaki Lighthouse and Yusen Bridge. Exploring these nearby spots will deepen your understanding of Sado's unique geography. The area is also a popular destination for island driving tours and is easily accessible from major ports like Ryotsu Port and Ogi Port.

While the paths are well-maintained, we recommend wearing comfortable walking shoes, especially when moving toward the coastal areas or the observation deck. Regarding payment, please check the availability of credit cards at specific facilities, as many spots may rely on cash. While there are English signs and digital displays, detailed information may require checking with local staff. Photography is permitted and encouraged, but please be mindful of other visitors. The facility is accessible, with wheelchair-friendly entrances and parking available.