Nori
je japanski naziv za različite vrste jestivih morskih algi koje spadaju u crvene alge porfira (Porphyra); uključujući najistaknutije vrste P. yezoensis i P. tenera. Gotov proizvod se dobija isušivanjem i skupljanjem algi, sličan proizvodnji papira. Japan, Koreja i Kina su trenutno najveći proizvođači nori algi.

Ranije se pod nazivom nori mislilo na mnogo više vrsta algi nego što je to slučaj danas; pa je tako i alga Hidžiki spadala u tu grupu. Jedan od najranijih opisa alge nori nalazi se u Tajho zakoniku iz 701. godine, gde se spominje njeno oporezivanje. Nori se ranije pripremao u vidu kaše a tek kasnije u toku Edo perioda, u Edo četvrti Asakusa, stvoren je nori u obliku tankih listova koji se i danas tako obranjuje. Ovaj postupak obrade vodi poreklo od japanskog načina pravljenja papira.

Nori se sastoji od 1/3 proteina i 1/3 jestivih vlakana. Sadrži visok postotak joda, karotena, vitamina A, B i C, kao i značajnu količinu kalcijuma i gvožđa. Dok hranjiva vrednost nori alge može da varira, u proseku 100 grama isušenog jaki-nori sadži:

Literatura 

 Merriam-Webster Dictionary
 Kodansha encyclopedia of Japan, Volume 6. Kōdansha. 1983. pp. 37. . "The word nori is used in Japan both as a general term for seaweed and as a name for a species of red algae (Porphyra tenera) that is commonly used as a foodstuff and is also known as asakusa- nori."
 Ragan, Mark A., ed (1987). Twelfth International Seaweed Symposium: proceedings of the Twelfth International Seaweed Symposium : held in Sao Paulo, Brazil, July 27-August 1, 1986. W. Junk. pp. 5. . "In the Law of Taiho (AD 701) which was established by the Emperor at that time, marine algae such as Laminaria, Undaria and its sporophyll, Porphyra and Gelidium are included among marine products which were paid to the Court as tax."
 Nishizawa, Kazutoshi (2002). Seaweeds kaiso: bountiful harvest from the seas : sustenance for health & well being by preventing common life-style related diseases. Japan Seaweed Association. "In the Law of Taiho (AD 701) which was established by the Japanese Fortysecond Emperor (Monmu-Tenno, 697-707) at that time, marine algae such as Laminaria, Undaria and their sporophyll, Porphyra and Geridium were paid to the Court as a tax."
 Hiroshi, Terayama (2003). 和漢古典植物考 (Japanese and Chinese Classical Botany). asaka Shobō. pp. 588. "There is a description "local peoples was drying nori" in Hitachi Province Fudoki (721–721), and also there is a description "nori was harvested" in Izumo Province Fudoki (713–733). These show nori was used as food from ancient times."
 

Japanska kuhinja