Every early spring, a quiet stretch of river in Yuasa comes alive with one of Wakayama’s most charming seasonal traditions.
Wooden fishing platforms stand above the water, fishermen carefully lower large square nets into the river, and visitors gather along the banks to watch a practice that has been passed down for generations.
Known as shirouo fishing, this tradition is more than a way of catching fish—it is a celebration of spring and a living part of Yuasa’s cultural landscape.
What Is Shirouo?
Shirouo is a tiny, almost transparent fish that migrates upstream from the sea in early spring to spawn.
Although often confused with shirauo (whitebait), they are different species. Shirouo are known for their delicate texture and subtle flavor, making them a highly anticipated seasonal delicacy in western Japan.
For local residents, the arrival of shirouo signals the beginning of spring.
A Traditional Fishing Method
Yuasa’s shirouo are caught using yotsude-ami, or square lift nets.
Fishermen stand on wooden platforms built over the Hiro River and lower a square net beneath the surface. After waiting quietly for a short time, they raise the net in one smooth motion, hoping to catch schools of tiny fish moving upstream.
Watching the nets rise from the water is a surprisingly captivating experience. It reflects the patience and knowledge developed through generations of living alongside the river.
Unlike modern commercial fishing, this method remains simple, quiet, and closely connected to the rhythms of nature.
You Don’t Have to Visit During the Festival
The best-known event is the Yuasa Shirouo Festival, usually held in mid-March.
During the festival, visitors can enjoy:
- Shirouo fishing experiences using the traditional lift nets
- Freshly prepared shirouo dishes
- Local food stalls and specialty products
- A lively atmosphere celebrating the arrival of spring
However, the festival is not the only opportunity to experience this tradition.
During the fishing season, visitors can often watch fishermen operating the lift nets along the Hiro River even on ordinary days. Because fishing depends on the tides, weather, and river conditions, there is no guarantee that fishing will be taking place at any particular time, but seeing the platforms in use offers a rare glimpse into everyday local life.
How to Enjoy Shirouo
If you have the chance, be sure to try shirouo while visiting Yuasa.
Popular preparations include:
- Odorigui (live shirouo) – the freshest and most traditional way to experience the fish.
- Egg-toji – gently cooked with beaten eggs for a soft, comforting dish.
- Tempura or kakiage fritters – light and crispy, highlighting the fish’s delicate flavor.
- Clear soup – a simple preparation that lets the subtle taste stand out.
- Seasonal rice dishes – available at some local restaurants during spring.
Since shirouo are available only for a short period each year, enjoying them is a true seasonal experience.
A Wonderful Spot for Photography
Even if you are not interested in fishing, the scenery along the Hiro River is worth visiting.
The wooden fishing platforms rising above the water create a distinctive landscape rarely seen elsewhere in Japan.
Early morning and late afternoon are especially beautiful, when soft light reflects on the river and fishermen work quietly against the backdrop of the surrounding countryside.
For photographers, it is an opportunity to capture not only a traditional fishing technique but also the peaceful atmosphere of rural Japan.
Combine It with a Day Exploring Yuasa
Shirouo fishing pairs perfectly with a visit to the historic town of Yuasa.
After watching the fishing, you can explore:
- The traditional streets where Japanese soy sauce first developed
- Historic soy sauce breweries
- Shops selling Kinzanji miso and other local specialties
- Restaurants serving fresh seafood and local cuisine
- Cafés housed in beautifully restored traditional buildings
Together, these experiences reveal why Yuasa is more than just the birthplace of soy sauce—it is a town where seasonal traditions, local food, and everyday life remain deeply connected.
Experience the Arrival of Spring in Yuasa
Many visitors come to Yuasa for its historic streets and famous soy sauce.
But if you visit in early spring, take time to stop by the Hiro River.
Watching fishermen quietly raise their square nets from the water is a simple yet unforgettable reminder that some of Japan’s most meaningful travel experiences are not found in grand attractions, but in traditions that continue to shape everyday life.
Enjoy Yuasa in early spring through my Curated Kii Peninsula Journey.
Read More About Yuasa
- Yuasa Soy Sauce: The Birthplace of Japanese Shoyu
- Yuasa Travel Guide: Discover the Birthplace of Shoyu Soy Sauce
- Yuasa Shoyu Soy Sauce & Fermentation Journey
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