Soyinfo Center

In October 1972 Willam Shurtleff and Akiko Aoyagi began full-time research on soyfoods in Japan while writing The Book of Tofu. In August 1976 they founded SOYINFO CENTER (named Soyfoods Center until 31 Dec. 2006) in California. We are authors.

Our Mission
To be the world's leading source of information on soy, especially soyfoods, new industrial uses, and history, in electronic database, online and printed book formats. To provide the information needed to transform soybeans into food products. To publish a history on every major subject related to soybeans and soyfoods. We do not sell books - or anything else - on this website..

Book Sales
Our printed and bound books have sold more than 830,000 copies. These include three popular books (The Book of Tofu, The Book of Miso, The Book of Tempeh), three production manuals (Tofu & Soymilk Production, etc.), 40 comprehensive bibliographies, plus market studies, histories and books of color graphics.

Building an Industry
Our three production manuals have played a key role in starting more than 450 soyfoods businesses in the United States, Europe, Latin America, and Africa .



SoyaScan Database
Contains more than 111,000 records from 1100 B.C. to the present, including more than 94,600 published documents, 16,700 commercial soy products, 6,340 original interviews and overviews, and 8,450 unpub-lished archival documents.

Research Library
More than 99,500 documents, almost all of which have a record in the SoyaScan database. Graphics Collection: More than 4,000 labels, ads, sell sheets, and other graphics, mostly color originals, arranged by subjects.


Free Digital History Books on Google Books

120 books by Shurtleff and Aoyagi on soyfoods and soybeans have been published on Google Books. Each contains hundreds of color graphics and a detailed bibliography. Since 2008 our main activity has been publishing these comprehensive, free digital books.

Friends of the SoyInfo Center
People who would like to support our work by contributions, volunteer work, or work on special projects.
Please contact us by phone if you are interested.

Book of Tofu

the Book of Miso

the Book of Tempeh

Top Soybean Plant
Photo By Mark L. Tucker