Ago Bay is the largest inlet on the Shima Peninsula in Mie Prefecture. Famous for its beautiful rias coastline and its historical role in the development of pearl cultivation, the bay offers a spectacular seascape of winding shores, sheltered coves, and more than 60 islands of various sizes.
The bay opens toward the sea between Goza Cape and Hamajima, with peninsulas and intricate coastlines extending into the water. One of the best places to appreciate this remarkable landscape is Yokoyama Observatory, which offers sweeping panoramic views across the islands and layered inlets of Ago Bay.
Ago Bay is renowned as the birthplace of cultured pearl production, and numerous pearl-farming rafts can still be seen floating across its calm waters. The sheltered environment has long supported pearl cultivation, making the bay an important part of Japan’s pearl heritage.
The waters are also home to a variety of fish and shellfish, and visitors can enjoy fresh seafood prepared with local ingredients. The surrounding hills and forests support trees such as ubame oak, Japanese andromeda, and Japanese pittosporum. These natural surroundings also provide opportunities for hiking and trekking.
Standing approximately 140 meters above sea level, Yokoyama Observatory offers one of the finest views of Japan’s rias coastline. From the observation point, visitors can look out over around 60 islands scattered across Ago Bay and the many peninsulas that extend into the water in overlapping layers.
The scenery changes with the seasons, with cherry blossoms in spring and colorful autumn foliage adding to the appeal of the surrounding landscape.
In August 2018, the Sky Terrace opened at Yokoyama Observatory, giving visitors a place to relax while taking in the panoramic views. Its takeaway café, Mirador Shima, offers local-inspired treats and refreshments, including sea lettuce scones, a bonito burger, and Shima soft-serve ice cream.
With its island-studded seascape, pearl-farming heritage, fresh seafood, and scenic walking opportunities, Ago Bay is one of the highlights of the Ise-Shima region.
Unokata Station/bus bound for Hamashima/Yukuura/25 minutes/get off at Hamashima