About Dan Kogai
Born 1969. Dan Kogai is a Japanese engineer, programmer and blogger.
is a Japanese open-source developer and alpha blogger, known for his blog 404 Blog Not Found (ranked #5 in Japan ). He is also the former CTO of Livedoor.
Background
Kogai went to middle school, but he had problems with formal education and skipped classes. Immediately after he graduated from middle school at the age of 16 he passed the high-school equivalence exam, and up until age 18 he spent his time teaching senior students as a tutor and cram school teacher. He then entered the University of California, Berkeley.
During his fourth year at university, his family's home burnt down, and he left school. He made a living with the computer skills he had learnt at university, and at age 29 was headhunted by Takafumi Horie to join Livin' On the Edge (now Livedoor).
Works
Self-authored
Co-authored
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Important facts
People in Dan Kogai's life
Named in this biography and alive at the same time
Contemporaries
People whose lives overlapped Dan Kogai's
Frequently asked questions
Who is Dan Kogai?
Japanese writer
When was Dan Kogai born?
Dan Kogai was born on 17 August 1969 in Tokyo.
What is Dan Kogai's occupation?
Dan Kogai is an engineer, programmer and blogger.
What nationality is Dan Kogai?
Dan Kogai is Japanese.
Sources & further reading
Cite this page
APA: Biography.guide. (2026). Dan Kogai. https://biography.guide/dan-kogai/
MLA: "Dan Kogai." Biography.guide, https://biography.guide/dan-kogai/.
Chicago: "Dan Kogai." Biography.guide. https://biography.guide/dan-kogai/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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