Guide
The Yoshino River Shirasu Unagi fishing is a long-standing traditional fishing method practiced near the mouth of the Yoshino River in Tokushima Prefecture. The focus of this method is the 'Shirasu Unagi' (glass eel), the juvenile stage of the eel. To capture these glass eels as they migrate from the sea into the river, fishing boats use powerful lights to illuminate the river surface at night. The sight of countless points of light floating in the pitch-black darkness is incredibly beautiful, resembling stars falling onto the river. This creates a truly mystical landscape born from the harmony of natural cycles and human activity.
This fishing method has a history deeply intertwined with the rich natural environment of the Yoshino River. The techniques and knowledge have been passed down through generations, timed specifically to the period when glass eels migrate from the sea to the river. Beyond being a mere commercial activity, it is a celebrated winter tradition of the region that continues to fascinate locals and visitors alike. This scenery, occurring under specific seasonal and environmental conditions, is a precious part of Japan's riverside culture.
The greatest highlight is the 'sea of light' that spreads across the mouth of the Yoshino River in the middle of the night. The powerful lights from the boats reflect off the water, creating a dramatic atmosphere in the silent night. Because the reflection changes depending on the tides and weather, the view offers a different expression every time you visit. The movement of the boats through the river adds a sense of mystery and depth, making it an exceptional subject for photographers seeking unique nightscapes.
The primary season for the Yoshino River Shirasu Unagi fishing is from mid-December to late April. Activity is most frequent during the winter months of December, January, February, March, and April. The fishing typically takes place during the late-night hours, roughly between 1:00 AM and 4:00 AM. Please note that the visibility of the lights can be affected by the lunar cycle; during a full moon, the glass eels may become more sensitive to light, which can lead to fewer boats being out, changing the visual spectacle. The most active periods are generally around the high and low tides.
The main activity here is observing the traditional fishing landscape and photography. The light displays created by the fishing boats offer a rare and special experience that cannot be seen during the day. Observing the movement of light across the river in the silence of the night allows you to feel the power of Japan's nature and traditional industries. *Note: If you wish to experience being on an actual fishing boat, prior confirmation and arrangements are required.
The area around the Yoshino River is dotted with spots where you can experience the rich nature and history of Tokushima Prefecture. When visiting the river mouth, you can plan a sightseeing route that includes nearby hot spring (onsen) facilities, historical buildings in Tokushima, or local restaurants serving regional delicacies. As this is a nighttime activity, it is important to check for nearby accommodation and transportation options that are available during late-night hours.
Since this is an outdoor observation at night, heavy winter clothing is essential. Temperatures in the middle of the night during winter are extremely low, so please prepare thick jackets, gloves, and heat packs (kairo). As you will be moving in dark areas, wear sturdy shoes with good grip. Regarding payments, if you use local shops or facilities nearby, it is highly recommended to carry cash in advance. For photography, please maintain a respectful distance to ensure you do not interfere with the fishing operations.