Lake Biwa, Japan’s largest and oldest lake, supports a food culture found nowhere else in the country: more than a thousand species live in its waters, dozens of them endemic, and lakeside kitchens have turned them into a distinctive freshwater cuisine over the centuries. The stars are ayu sweetfish — grilled whole over charcoal with salt, at their best in early summer — and the endemic Biwa trout (biwamasu), whose cool-water flesh makes sashimi as silky as fine salmon, joined by simmered tiny gobies and moroko, shijimi-clam miso soup and tempura of lake shrimp, served everywhere from venerable ryotei to market stalls.
🗓️ At a Glance
| Location | Lakeside towns across Shiga |
| Hours | Restaurant hours vary |
| Admission | Set meals ~¥1,500–5,000 |
| Time needed | 1–2 hours for a meal |
| Best time | Early summer for ayu; year-round for Biwa trout |
What to Try
- Charcoal-grilled ayu with salt, early summer’s signature.
- Biwa trout sashimi, the endemic silky delicacy.
- Simmered lake gobies, moroko and shijimi-clam miso soup.
- Lake-shrimp tempura and the full lakeside ryotei spread.
Combine Your Visit
- Combine with funazushi , the lake’s fermented legend.
- Pair with a Lake Biwa cruise for the source itself.
- Read our Shiga overview .
Getting There
- Where: lakeside restaurants in Otsu, Omihachiman, Hikone and Takashima.
- Season: ayu peaks June–August; Biwa trout is served year-round.
Tips
Order the lake kaiseki set at a lakeside ryotei if you can — a single spread covers ayu, Biwa trout, gobies and shrimp, the whole lake on one table. Biwa trout sashimi is the sleeper hit: many visitors expect river-fish plainness and find something closer to toro, so don’t leave without trying it.
