Inasayama Park Observation Deck stands at the summit of Mount Inasa, 333 meters above sea level, in Nagasaki City, Nagasaki Prefecture. From here, visitors can enjoy a magnificent 360-degree panorama of the city, its harbor, and the surrounding mountains and coastline. The view is particularly breathtaking after dark, when the lights of Nagasaki spread across the hillsides and waterfront, creating a glittering landscape often described as a “10-million-dollar night view.”
Nagasaki’s nightscape is widely regarded as one of Japan’s three great night views, alongside those of Mount Hakodate in Hakodate and Mount Maya in Kobe. The city has also received international recognition as one of the New Three Major Night Views of the World, making the observation deck a must-visit destination for travelers who want to experience one of Japan’s most memorable panoramas.
The observation deck offers a sweeping view of Nagasaki’s distinctive landscape, where the harbor, urban districts, and surrounding hills come together. During the day, visitors can appreciate the city’s geography and the beauty of its natural setting. As evening approaches, the changing light transforms the scenery, and after sunset, countless lights illuminate the city streets, buildings, and port area.
Because the viewing area provides a wide, open panorama, it is an excellent place for photography and sightseeing throughout the year. The contrast between the dark hills and the illuminated city is especially striking at night, while clear daytime conditions offer a different perspective on Nagasaki’s coastal surroundings.
The observation deck is part of Inasayama Park, a spacious recreational area located partway up and around the mountain. The park offers much more than scenic viewpoints, making it an enjoyable destination for families, nature lovers, and visitors looking for outdoor activities.
Facilities include the Inasayama Outdoor Music Hall, a children’s play area with large slides and a fountain plaza, and a small animal area where monkeys and deer are kept. Visitors can observe the animals free of charge. The park also has a free parking area with space for approximately 400 vehicles.
Inasayama Park is also well known for its azaleas. Approximately 80,000 azalea plants bloom across the park, bringing vibrant color to the mountain slopes during the flowering season. This seasonal display makes the park an attractive place to visit in spring, even for travelers who are more interested in flowers and nature than in the night view.
Several hiking trails wind through the mountain, allowing visitors to enjoy a walk surrounded by nature on their way up Mount Inasa. The trails offer an opportunity to appreciate the landscape at a slower pace while discovering the mountain’s distinctive natural environment.
The area around the trails has volcanic tuff geology and relatively poor soil. Despite these conditions, it supports specialized vegetation, including Nagasaki-mannen-gusa, a plant associated with this region that is not commonly found elsewhere. These natural features add another dimension to the mountain’s appeal beyond its famous city views.
Visitors can travel from the middle section of the park to the summit observation deck aboard the Nagasaki Inasayama Slope Car. This modern hillside transport system provides a convenient alternative to walking and offers a pleasant journey through the mountain landscape.
The slope car was designed by industrial designer Kiyoyuki Okuyama, who is known for work on high-end automobiles, including Ferrari. Its vehicles are engineered to remain level even as the gradient of the track changes, combining distinctive design with passenger comfort. The ride itself is part of the sightseeing experience, offering a different perspective from the aerial views available on the ropeway.
Another popular way to reach the observation deck is the Nagasaki Ropeway, which connects Fuchijinja Station at the foot of the mountain with Inasayama Station near the summit. The route covers approximately 1,110 meters, taking visitors up the mountain without the need for a strenuous climb.
The ropeway is a particularly appealing choice for visitors who want to enjoy the scenery during the ascent before taking in the panoramic view from the summit. Whether you arrive by ropeway, slope car, or hiking trail, Inasayama Park offers a memorable combination of natural beauty, recreation, and spectacular views over Nagasaki.
There is a restaurant at the observatory, where you can enjoy a meal while looking at the night view in front of you.
Inasayama Park is also famous for its azaleas, with as many as 80,000 blooming in Inasayama Park.
The Nagasaki Inasa Slope Car will take you from the parking lot in the middle of the mountain where Inasa Park is located to the observation deck at the top of the mountain.
The car was designed by Kiyoyuki Okuyama, an industrial designer who has worked on luxury cars such as the Ferrari, and is designed to keep the car level even when the gradient changes.
The Nagasaki Ropeway takes visitors directly to the top of Mt.
The ropeway runs 1,110 meters from Fuchi Jinja Station at the foot of the mountain to Inasadake Station at the summit.
10 minutes by bus from Nagasaki Station → 5 minutes by ropeway