Geography and Natural Surroundings
The Hahagawa River originates in the Kushikawa area of Kaiyo Town and flows eastward before joining the right bank of the Kaifugawa River. Broad stretches of flat land extend along its banks, much of which is used for rice cultivation. Near the lower reaches, natural levees create areas of gently changing terrain, while backswamps spread west of Noe. These varied landforms support a rich local ecosystem and contribute to the peaceful rural scenery that makes the river so appealing.
The Legend Behind the River’s Name
The origin of the name Hahagawa is recorded in the local Kaifu District Gazetteer. According to the story, a devoted son once dug a pond and used the clear water he found there to care for his mother. Over time, the spring water developed into a river, which came to be known as Hahagawa, meaning “Mother River.” This touching legend has helped make the river a special place in the hearts of local residents.
A Northern Habitat for the Giant Japanese Eel
The Hahagawa River is also notable as one of the northernmost habitats of the giant Japanese eel, a species designated as a National Natural Monument of Japan. The eels inhabit an approximately 2-kilometer stretch around Seriwari Rock, a distinctive geological formation in the foothills west of the river’s confluence with the Kaifugawa River. This area is protected to help preserve the species and its natural environment. Visitors can appreciate the river not only for its scenery but also for the rare wildlife sustained by its waters.
Hahagawa Firefly Festival
Each year, the Hahagawa Firefly Festival brings visitors to the river to witness the enchanting glow of Genji fireflies. The event is organized by local volunteers who work to protect the firefly population and share the area’s natural and cultural attractions with the wider community.
As the evening grows dark, countless points of light appear along the river, creating a magical scene that feels far removed from the bustle of city life. The festival offers a memorable opportunity to experience the beauty of rural Japan while learning about the community’s efforts to preserve its natural heritage.
Enjoy Fireflies from a Traditional Boat
During the festival, visitors can enjoy hands-on activities, including learning how to make small boats from bamboo grass leaves. These simple experiences offer a closer connection to local traditions and the natural environment.
One of the highlights is a ride on a traditional Takase-bune boat, from which visitors can quietly watch the fireflies along the river. Their lights shimmer across the water, creating a serene and dreamlike atmosphere. This gentle encounter with nature is one of the most memorable ways to experience the Hahagawa River.
Getting to the Hahagawa River
Hahagawa is located in Kaiyo Town, Tokushima Prefecture, and can be visited by public transportation or car. The surrounding area is rich in natural attractions, making it a pleasant destination to include in a scenic drive through southern Tokushima. Visitors planning to attend the firefly festival should check the latest local event information before traveling.
Discover the Culture and Seasons of Kaiyo Town
The appeal of the Hahagawa River extends beyond its clear waters and fireflies. Local legends, traditional customs, and a way of life closely connected to nature all contribute to the area’s distinctive character. The landscape changes with the seasons, from spring blossoms to autumn foliage and the summer evenings when fireflies illuminate the riverbanks.
When visiting Kaiyo Town, take time to explore the riverside countryside and experience the harmony between the natural environment and the local community. Hahagawa offers a peaceful and rewarding stop for travelers seeking a quieter side of Tokushima.