Seaweed
Hijiki
a black, mineral-rich seaweed dried into small dark strands
A brown seaweed that grows on rocky shores, brown when fresh but drying and processing into small black strands and pellets. Simmered, it carries a distinct briny aroma and a mineral-rich crunch, classically cooked with soybeans and carrot.
What it's made of
Fresh hijiki is yellow-brown, but processing turns it black into the familiar small strands and pellets. It grows dense on rocks in the intertidal zone, forming colonies from early spring into early summer. Simmered, it carries a distinct briny aroma and a mineral-rich crunch — a seaweed whose flavor sharpens the more you chew it, despite its plain look.
How it's made
Harvest is limited to spring, roughly March to June, before the fronds toughen. In the Ise region it is sun-dried, then rehydrated to remove salt, steamed, and dried again; in the Boso region it is instead boiled in seawater before drying. Either process is meant to soften fibers too tough to eat raw — and the differing steps by region are a story in themselves.
Why it took this shape
It has long been gathered along rocky coasts from Ise-Shima in Mie and Boso in Chiba to Ehime, Oita, and Nagasaki, with each region developing its own processing method. The classic pairing with soybeans and carrot is thought to have taken hold as a way of folding this hard, black seaweed into everyday side dishes — a way of making a plain-looking seaweed the center of the plate.
Dishes in the same style
- AosaA green seaweed that thrives in brackish water near river mouths. Dried, it turns deep green and is used as a briny-aromatic garnish in soup, tempura, and to finish okonomiyaki; fresh it is quite bitter, so it typically circulates dried.
- Hidaka KonbuFormally called mitsuishi kelp. Softer and quicker-cooking than other kelps, sometimes called "fast-boiling kelp"; the spent strands are easy to eat as a simmered side after making dashi, making it a household all-rounder.
Ingredients and dishes from this land
Known source
- Known source: Mie, Ise
The rocky Ise-Shima coast has long been worked for this seaweed.
- Known source: Chiba, Tateyama
The southern tip of the Boso Peninsula is also a leading producing area.
Contrast
- NoriA general term for seaweed dried into paper-thin sheets. Pole-and-net farming in shallow water with a big tidal range lets it soak at high tide and sun-dry at low tide, concentrating its umami; toasted, it turns crisp and fragrant, with the first harvest said to be softest and sweetest.
- WakameA brown seaweed used widely in miso soup and salads. Its thickness and bite are said to vary with the strength of the local tidal current, turning bright green when briefly dipped in hot water; fresh spring wakame is said to be most aromatic.