Unagi Yaotoku Honten trades on a tare sauce first mixed in 1919 and continuously topped up ever since, a barrel of soy, mirin, and eel drippings that has become the restaurant's calling card in Hamamatsu, the city most associated with commercial eel farming on Lake Hamana. The unaju arrives glazed in that century-old sauce over rice in a lacquer box, while the kimo-yaki grilled liver skewers and the shirayaki, unseasoned eel eaten with wasabi and salt to show off the fish itself, round out the menu for diners who want more than one cut of the eel. The dining room, a five-minute walk from Hamamatsu Station, keeps a traditional feel with tatami-adjacent seating alongside regular tables, and the atmosphere stays quiet and food-focused rather than lively. Beverage choices favor local Enshu sake pairings over wine. Because the tare and the grilling method draw diners from outside the city, reservations are recommended, particularly for the dinner service and weekend lunches when tables turn over slowly.
Signature dishes
- Unaju with secret century-old tare sauce
- Kimo-yaki (grilled eel liver)
- Shirayaki (unseasoned grilled eel with wasabi and salt)
Good to know
- Known for
- Hamamatsu unagi (grilled eel); known for unaju with 1919 heritage sauce
- Hours
- Daily 11AM-2PM and 5PM-9PM
- Reservations
- Recommended
Location
Naka-ku, Hamamatsu-shi, Shizuoka, Japan (5-minute walk from JR Hamamatsu Station)
34.7061, 137.7326 View on map
Highlights
- Tare sauce base dating to 1919
- Shirayaki unseasoned eel served with wasabi and salt
- Five-minute walk from Hamamatsu Station
Tips for visiting
- Order shirayaki alongside unaju to taste the eel with and without the historic sauce
- Dinner reservations are worth making a few days ahead on weekends
- Lunch sets are more affordable than the evening course
Accessibility
The restaurant has street-level access near the station; some seating areas use traditional tatami-style flooring, so guests requiring standard chair seating should request a table area when arriving.
Frequently asked questions
What is special about the sauce?
The restaurant has maintained the same tare barrel, continuously replenished, since 1919, giving the glaze a deep, aged flavor.
Should I book ahead?
Reservations are recommended, especially for dinner and weekend visits, since the dining room is modest in size.
What is shirayaki?
It is eel grilled without sauce, served plain with wasabi and salt so diners can taste the fish's natural flavor.