Takamori Spring Tunnel Park is a beautiful park in Takamori Town, Aso District, Kumamoto Prefecture. Known for its abundant spring water and atmospheric underground tunnel, the park offers visitors a fascinating combination of natural scenery, engineering history, and seasonal displays.
The tunnel was originally planned as part of a railway project to connect the former Japanese National Railways’ Takamori Line with the Takachiho Line. Construction of the Takamori Tunnel began in 1973, with a planned total length of 6,480 meters.
However, a major water-inrush accident occurred in 1975, and repeated incidents involving underground water made construction increasingly difficult. Work was eventually halted after 2,055 meters of tunnel had been excavated, and the project was officially abandoned in 1980.
Part of the unfinished tunnel and the area near its exit were later developed into a public park. The site opened to visitors in 1994, allowing the abandoned railway infrastructure to be enjoyed as a distinctive attraction.
The tunnel continues to produce an impressive volume of spring water, approximately 32 tons per minute. This water is an important local resource, supplying water for drinking and agricultural use and supporting the daily lives of people in the surrounding community.
The temperature inside Takamori Spring Tunnel remains relatively constant at around 17°C throughout the year. It offers a cool retreat in summer and a comfortable environment in winter, making it an appealing destination in every season.
One of the tunnel’s best-known attractions is the Water Pearl, a special fountain installation that creates the illusion of transparent droplets floating in midair. The unusual effect, combined with the tunnel’s lighting and flowing water, gives the interior a mysterious and enchanting atmosphere.
The park hosts seasonal events that bring additional color to the tunnel. In July, the Tanabata Festival features beautiful decorations inspired by the traditional Japanese Star Festival. In December, the Christmas Fantasy event fills the tunnel with illuminations, transforming the underground passage into a magical setting.
These seasonal displays offer a reason to visit at different times of the year and are popular with visitors who want to experience the tunnel in a festive atmosphere.
A museum called Yusuikan is located above the tunnel. Exhibitions introduce the history of the tunnel and the area’s spring water, helping visitors learn more about Takamori Town’s natural environment and local heritage.
The displays explain the importance of the region’s water resources and the history of the railway construction project. The museum also serves an educational purpose by showing how the tunnel’s construction affected the surrounding environment and community.
The water-inrush accident in 1975 had a serious impact on nearby springs, many of which almost completely dried up. Approximately 190 households had relied on this spring water for everyday use.
To address the resulting water shortage, the railway construction authority funded the installation of water-distribution facilities for the affected residents. According to the source article, the compensation arrangement remains in place and continues to support local people’s daily lives.
1034-2 Takamori, Takamori Town, Aso District, Kumamoto Prefecture, Japan
Adults: ¥300
Children: ¥100
April through October: 9:00 a.m.–6:00 p.m.
October through March: 9:00 a.m.–5:00 p.m.
Yusuikan Museum: 9:00 a.m.–4:00 p.m.
The park itself has no regular closing days. Yusuikan Museum is closed on Mondays, except when a public holiday falls on a Monday.
From Takamori Station on the Minamiaso Railway Takamori Line, the park is approximately a 14-minute walk, covering about 1,100 meters.
Visitors traveling from Kumamoto can take the Takamori-go bus operated by Kyushu Sanko Bus from Kumamoto Sakuramachi Bus Terminal. Get off at the Takamori Yusui Tunnel Park Entrance bus stop, then walk approximately 7 minutes, or about 580 meters, to reach the park.
The park is approximately 39 kilometers from Kumamoto Interchange on the Kyushu Expressway. Parking is available, making the site convenient for visitors traveling by car.
Takamori Spring Tunnel Park is a distinctive destination where an unfinished railway tunnel has been transformed into a place for appreciating nature and local history. The steady flow of spring water, the unusual Water Pearl fountain, and the seasonal decorations make the tunnel an intriguing place to explore throughout the year.
Visitors can also learn how the tunnel’s construction affected the local water supply and how the community responded to the resulting challenges. A visit offers not only a relaxing underground experience but also a glimpse into the relationship between infrastructure, natural resources, and everyday life in Takamori Town.