Hijiki

What Is Hijiki?

Hijiki (Sargassum fusiforme) is a seaweed that grows along the coasts of Japan and East Asia and is traditionally harvested and dried. When dried, it is black, thin, and shaped like short strands or sticks; soaking makes it swell and soften.

In Japanese cuisine, it is used mostly as a side dish, usually cooked with soy sauce, dashi, and vegetables (carrots, soybeans, and tofu). It has a sea-like smell and a mildly salty, umami-like flavor.

Hijiki Nutrition Facts

As a dried seaweed, hijiki contains fiber and various minerals; because it is used in very small amounts after soaking and cooking, its calorie contribution to a meal is low. For this reason, a detailed nutrition table is not provided.

How to Consume Hijiki Safely

Hijiki differs in an important way from many other seaweeds: because of the inorganic arsenic that can occur naturally in hijiki, some food safety agencies advise against frequent or large amounts, and some recommend avoiding it. For this reason, soak hijiki thoroughly, change the water, and consume it in moderation; sensitive groups (for example, children and pregnant people) should be even more cautious.

This is general information; hijiki is a food and is not a substitute for medical treatment. Keep the safety recommendations above in mind when consuming it.

How to Choose Hijiki

Good hijiki should be dry, glossy black, clean, and smell of the sea. Avoid damp or moldy products or those with an unclear source; buying from a trusted producer is important.

• It should be dry, glossy black, and clean.
• It should smell of the sea and show no mold.
• Buy it from a trusted producer.

How to Store Hijiki

Store dry hijiki for a long time in a sealed container in a cool, dry place; moisture can lead to mold, so keep the jar dry. Soaked and cooked hijiki keeps for a few days in the refrigerator.

Using Hijiki in the Kitchen

Prepare hijiki by soaking it in warm water for 15–30 minutes and draining it (discard the soaking water); then cook it with soy sauce, vegetables, and tofu. Use it in small amounts in salads, rice dishes, and side dishes; always soak and cook it.

Why Is Hijiki Soaked and the Water Discarded?

Soaking both softens the seaweed and helps remove some water-soluble substances, including arsenic; for this reason, discard the soaking water instead of using it, then cook the hijiki with fresh water.

Frequently Asked Questions

Is hijiki safe?

Because it may contain inorganic arsenic, some authorities advise against frequent or large amounts; when thoroughly soaked and consumed in moderation, it is eaten as a side dish, but sensitive groups should be cautious.

Is hijiki the same as other seaweeds?

No. Each seaweed has a different composition. Because hijiki is notable for inorganic arsenic, more caution is recommended with it than with other seaweeds.

What does hijiki taste like?

It has a sea-like smell and a mildly salty, umami-like flavor; cooked with soy sauce and vegetables, it makes a balanced side dish.