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William Saito

b. 1971

American businessman

Businessperson Venture capitalist
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About William Saito

Born 1971. William Saito is an American and Japanese businessperson and venture capitalist.

is a Japanese American businessman, venture capitalist and former advisor to the government of Japan specializing in cybersecurity. after the falsification and misrepresentation of his career was reported, including the medical license and the degree of UCLA.

Early life and education Saito was born in Los Angeles, California; his parents immigrated to the US from Japan in 1969, two years before he was born. He is the eldest of three children. He attended the University of California, Riverside from the Fall of 1988 to the Fall 1992, and was a student in Riverside's joint Biomedical Science Program with the University of California, Los Angeles in 1988.

Career When Saito was a junior in high school, he started a business in computer security. He later established the company as I/O Software in 1991 when he was a student. Microsoft began a partnership with I/O Software in 2000 to adopt the latter's authentication technology in future versions of Microsoft Windows. Saito sold the I/O Software business assets to Microsoft in 2004.

Saito was an advisor to Prime Minister Shinzo Abe on cybersecurity issues. Saito accompanied Abe on a 2015 visit to Silicon Valley, where Abe met with the heads of several major technology firms. He was a cybersecurity advisor to the Cabinet Office from 2013 and an advisor to the Ministry of Economy, Trade and Industry until revelations that led to his admission that he misrepresented his education and academic degrees came to light and he resigned these and other posts in 2017.

In May 2019, Saito took a legal action in the Tokyo regional court against Kodansha which published the Shukan Gendai magazine (published on 3 March 2018). Kodansha paid a settlement and deleted the article at the request of the court.

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Important facts

Birth century
Education
University of California, Riverside, Damien High School
Employers
Tokyo University of Agriculture and Technology, Palo Alto Networks
Also known as
William H. Saito

Contemporaries

People whose lives overlapped William Saito's

Frequently asked questions

Who is William Saito?

American businessman

When was William Saito born?

William Saito was born on 23 March 1971 in Los Angeles.

What is William Saito's occupation?

William Saito is a businessperson and venture capitalist.

What nationality is William Saito?

William Saito is American and Japanese.

Sources & further reading

· Wikipedia: William Saito

· Wikidata: Q8018047

· DBpedia: William Saito

Cite this page

APA: Biography.guide. (2026). William Saito. https://biography.guide/william-saito/

MLA: "William Saito." Biography.guide, https://biography.guide/william-saito/.

Chicago: "William Saito." Biography.guide. https://biography.guide/william-saito/.

Data last updated: 2026-09-22 · Spot an error? Report a correction.

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