I am a software programmer/engineer, the auther of “The Internals of PostgreSQL” and pg_plan_inspector.

I graduated from graduate school of information engineering (M.S. in Information Engineering), had worked for several companies as a software developer and technical manager/director, and published seven books (4 PostgreSQL books and 3 MySQL books) in Japanese and a Chinese book.

As a director of the Japan PostgreSQL Users Group (2010-2016), I organized the largest (non-commercial) technical seminar/lecture of PostgreSQL in Japan for more than six years, and also served as the program committee chair of the Japan PostgreSQL Conference in 2013 and as a member in 2008 and 2009.

Cuando era joven, vivió en Sudamérica por unos años. Recientemente, a veces vuelve a allí.

Now I live in Zurich.

I love animals, music, science (math, astronomy, physics, etc.). I’m interested in History, Animal Rights, Social Issues, Environment Issues. I play the piano and guitar. Vegetarian.