Sansai Ryori Yamanaka is a restaurant in Numata City, Gunma, dedicated to sansai ryori — cuisine based on wild-foraged mountain vegetables, a cooking tradition that thrives in Gunma's highlands due to the prefecture's proximity to the Oze National Park highland plateau and the Minakami mountain ranges. The word sansai encompasses a broad category of edible wild plants — fiddlehead ferns (warabi, zenmai), butterbur shoots (fuki no to), chrysanthemum greens, mountain burdock (yamagobo), and dozens of seasonal species — that are foraged from forest floors and river margins between early spring and midsummer, then preserved through pickling and salt-pressing for use in autumn and winter. Yamanaka's menu rotates daily depending on what has been foraged and what is available from preserved stocks. The sansai tempura platter is the centrepiece: a wide, carefully arranged selection of battered and fried wild vegetables served with tentsuyu dipping sauce and grated daikon; the batter is kept thin to allow the character of each vegetable to show through. A wild vegetable and tofu set presents the same seasonal forage in a more restrained, healthful arrangement. Seasonal mountain rice — rice cooked with mixed-in sansai, mushrooms, and mountain herbs — provides a dish that condenses the forest into each mouthful. The dining room occupies a modest shopfront in Numata's southern commercial district; atmosphere is quiet and unpretentious. Numata City is the gateway to the Oze wetlands and the Minakami gorges, placing Sansai Ryori Yamanaka in natural alignment with visitors exploring Gunma's highland interior.
Signature dishes
- Sansai tempura platter
- Wild vegetable and tofu set
- Seasonal mountain rice dish
Good to know
- Known for
- Wild foraged mountain vegetables from the Oze and Minakami highlands; changes daily based on season
- Hours
- 11:00AM–2:30PM; Dinner by reservation only; closed Wednesday
- Reservations
- Required for dinner
Location
1-5-3 Minami-machi, Numata, Gunma 378-0031
36.6468, 139.0450 View on map
Highlights
- Sansai tempura platter with seasonal wild mountain vegetables foraged from the Gunma highlands
- Daily rotating menu based on available foraged and preserved mountain species
- Seasonal mountain rice cooked with sansai and highland mushrooms
- Gateway to Oze National Park — natural pairing with highland hiking or wetland walks
- Dinner available by reservation only; a fuller course format than the walk-in lunch
Tips for visiting
- Spring (late April to early June) offers the peak fresh sansai season — the menu is most varied
- Ask the server to explain the day's foraged species; staff are knowledgeable and enthusiastic about the ingredients
- Reserve dinner at least one day ahead (+81 278-22-3344); the kitchen prepares only reserved quantities
- The sansai tempura platter at lunch (from ¥1,200) is the best-value entry; dinner courses extend to ¥3,000
- Combine a Yamanaka lunch with a morning walk at Oze (40 minutes north by car) for a full highlands day
When to visit
Late April through June for fresh sansai; dinner in autumn for the preserved mountain vegetable course with wild mushrooms.
Accessibility
The restaurant is on the ground floor of a standard shopfront building. Entrance appears to be at street level with conventional table-and-chair seating. Confirm step-free access by phone before visiting (+81 278-22-3344).
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Frequently asked questions
When is the fresh sansai season in Gunma?
Fresh sansai foraging runs from approximately late March (warabi, fuki no to) through June (kikuna, zenmai, mountain burdock). Preserved sansai extend the season through autumn and into winter.
Is sansai ryori vegetarian?
The sansai themselves are plants, but Japanese dashi broth is typically made from fish stock. Fully vegetarian preparation can usually be arranged with advance notice — inquire when reserving.
How far is Numata from Takasaki?
JR Joetsu Line from Takasaki to Numata Station takes approximately 50 minutes. Numata is also accessible by highway bus from Shinjuku in approximately 2 hours 30 minutes.
What is Numata City known for besides sansai?
Numata is the starting point for excursions to Oze National Park wetlands, Minakami onsen gorges, and Tanigawa mountain area. The city also holds a historic castle ruin (Numata-jo) in a forested park.