Akanishigai nigiri

Akanishigai

【Nigiri sushi: Kai】
The Konaganishi (Fusinus ferrugineus) is a species of snail found from Mutsu Bay along the Sea of Japan coast to northern Kyushu, and its shell can grow to about 8 cm in length. It is characterized by its vivid red flesh and is known as “Akabe” in the Sakaiminato area of Tottori Prefecture and as “Akanishigai” in Nanao, Ishikawa Prefecture. However, the standard Japanese name “Akanishi” actually refers to a different species, Rapana venosa (Valenciennes, 1846). Consequently, confusion can arise because Konaganishi is often referred to by the regional name “Akanishigai or Akanishi.”

The meat has a crunchy texture, and when eaten, it releases a briny aroma and a subtle sweetness. In addition to nigiri and gunkan-maki, it is used in sashimi and vinegared dishes and is typically enjoyed with soy sauce or ponzu. On the other hand, the elongated shell contains innards with a distinctive astringent taste, and only a small amount of meat attached to the underside of the shell is edible. Preparing it, such as removing the innards and rinsing off the slime, is a labor-intensive process.

Furthermore, in Hiroshima Prefecture, since the Naganiishi (Fusinus perplexus), which had long been prized, is no longer caught, Konaganishi has come to be eaten as a substitute. As a result, Konaganishi landed at Sakaiminato is sold for high prices at auction and is sometimes shipped to Hiroshima. Due to these circumstances, even if you visit Sakaiminato, it is not easy to find restaurants or sushi shops that serve Akanishigai (Akabe).

Therefore, if your goal is to savor Akanishigai, Nanao in Ishikawa Prefecture is another option to consider. Nanao is home to Wakura Onsen, a hot spring with a history dating back approximately 1,200 years, and the hot spring town features many long-established sushi restaurants. Since Akanishigai is served as one of Nanao’s local specialties, you are relatively likely to find an opportunity to try it there.

* The English name for Akanishi is Top Shell. However, the Akanishigai used for nigiri sushi in Nanao is actually Konaganishigai, which has no English name. We decided to adopt the Japanese name “Akanishigai” rather than resorting to a literal or free translation.

【Related contents】
List of Shellfish (Kai)

(Revision date: September 29, 2026)