Yukihiro Matsumoto (松本行弘 (まつもとゆきひろ), Matsumoto Yukihiro?, a.k.a. Matz, born 14 April 1965) is a Japanese computer scientist and software programmer best known as the chief designer of the Ruby programming language and its reference implementation, Matz's Ruby Interpreter (MRI).
As of 2011, Matsumoto is the Chief Architect of Ruby at Heroku, an online cloud platform-as-a-service in San Francisco. He is a fellow of Rakuten Institute of Technology, a research and development organization in Rakuten Inc.
Matsumoto's name can be written using kanji: 松本行弘, but is normally written using hiragana: まつもとゆきひろ.
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