Seafood ── Fish
Nijimasu
rainbow trout — an introduced trout now farmed across Japan
A trout native to North America, introduced to Japan in the Meiji era and now farmed nationwide. Spring-fed farms hold a steady temperature that keeps flesh firm year-round, and it is served salt-grilled, fried, or even raw.
- Freshwater fish
What it's made of
A trout native to North America, its flesh pale orange, mild yet moist when salt-grilled. Fried, the skin turns crisp while the flesh stays soft, and fish raised in well-managed farms carry little off-flavor, mild enough to serve raw — with less seasonal swing in flavor than most fish, a steadiness quite different from a wild river fish's.
How it's made
Typically raised in spring-fed ponds, where a steady year-round temperature keeps flesh firm regardless of season. Feed mix and water temperature can be adjusted to shape texture and fat content, giving farmed fish more consistent flavor than most wild catches. Many farms also withhold feed briefly before shipping to clear any muddy taste.
Why it took this shape
Spring water flowing from Mt. Fuji holds a nearly constant temperature year-round, an environment well suited to rainbow trout farming. Fujinomiya in Shizuoka is said to be where farming using this spring water began in the Meiji era, and it has remained a local industry built on that steady water ever since — an underground gift of water that let this fish be raised without depending on any one river.
Before you go
- How to shop at a supermarketHow to choose prepared foods, sashimi, and packaged sushi, when discount stickers tend to appear, region-only specialties, buying by weight, the checkout and bagging flow, and sampling etiquette at a local supermarket.
- Roadside stations, direct-sale stands, and marketsHow to enjoy buying food near where it's produced, visiting and shopping at morning markets and fish markets, what to expect at farm stands, and finding local food at roadside stations (michi-no-eki).
- Foods to look for in springA guide to foods often seen in Japan around spring — early bonito, bamboo shoots, sakura mochi, hanami bento, new-season tea, and butterbur sprouts — with rough pointers for finding them.
Dishes in the same style
- AyuA river fish that grazes algae off clean streambed stones, giving it a distinct watermelon-like scent. Salt-grilled and famously caught by tomo-zuri decoy fishing — the clearer the river, the more that scent is said to stand out.
- DojoA slender fish of paddy mud and streams, simmered whole in yanagawa-nabe hot pot or skewered plain and glazed sweet-savory. Hardy enough to survive poor water quality, it has long been an everyday fish even from canals near cities.
Ingredients and dishes from this land
Known for it here
- Known for it here: Shizuoka, Fujinomiya
Fed by spring water from Mt. Fuji, this city is said to be where rainbow trout farming began in the Meiji era, and calls itself its birthplace.