:Yukihiro Matsumoto

Born in Osaka Prefecture, Japan, he was raised in Tottori from the age of four. According to an interview conducted by Japan Inc., he was a self-taught programmer until the end of high school.{{cite web|url=http://www.japaninc.com/article.php?articleID=828|title=The Man Who Gave Us Ruby|work=japaninc.com|date=8 November 2006 }} He graduated with an information science degree from University of Tsukuba where he was a member of Ikuo Nakata's research lab on programming languages and compilers.

He works for the Japanese open source company Netlab.jp. Matsumoto is known as one of the open-source evangelists in Japan. He has released several open source products, including cmail, the Emacs-based mail user agent, written entirely in Emacs Lisp. Ruby is his first piece of software that became known outside Japan.{{cite web|url= http://www.oreilly.com/pub/au/714|title=Yukihiro Matsumoto|date=1 February 2013|work= O’Reilly}}

Matsumoto released the first version of the Ruby programming language on 21 December 1995.[http://eigenclass.org/hiki/ruby+0.95 More archeolinguistics: unearthing proto-Ruby] {{webarchive |url=https://web.archive.org/web/20151106023204/http://eigenclass.org/hiki/ruby+0.95 |date=6 November 2015 }}{{cite web|url=http://blade.nagaokaut.ac.jp/cgi-bin/scat.rb/ruby/ruby-talk/382|title=[ruby-talk:00382] Re: history of ruby |work=nagaokaut.ac.jp}} He still leads the development of the language's reference implementation, MRI (Matz's Ruby Interpreter).

In April 2012, Matsumoto open sourced his work on a new implementation of Ruby called mruby.{{cite web|url=https://github.com/mruby/mruby|title=mruby: Lightweight Ruby|date=2 November 2017|via=GitHub}}{{cite web|url=http://matt.aimonetti.net/posts/2012/04/20/mruby-and-mobiruby/|title=mruby and MobiRuby – Matt Aimonetti|author=Matt Aimonetti|work=aimonetti.net|date=20 April 2012 }} It is a minimal implementation based on his virtual machine, ritevm, and is designed to allow software developers to embed Ruby in other programs while keeping memory footprint small and performance optimized.

In December 2014, Matsumoto open sourced his work on a new scripting language called streem, a concurrent language based on a programming model similar to shell, with influences from Ruby, Erlang, and other functional programming languages.{{cite web|url=https://github.com/matz/streem|title=matz/streem|work=GitHub}}

Matsumoto has been listed as an investor for Treasure Data; many of the company's programs such as Fluentd use Ruby as their primary language.{{cite web|url=http://www.treasuredata.com/company|title=Company – Treasure Data|archive-url=https://web.archive.org/web/20150503031037/http://www.treasuredata.com/company|archive-date=2015-05-03|access-date=2022-01-01}}

• オブジェクト指向スクリプト言語 Ruby {{ISBN|4-756-13254-5}}
• Ruby in a Nutshell {{ISBN|0-596-00214-9}}
• The Ruby Programming Language {{ISBN|0-596-51617-7}}

Matsumoto received the 2011 Award for the Advancement of Free Software from the Free Software Foundation (FSF) at the 2012 LibrePlanet conference at the University of Massachusetts Boston in Boston.{{cite web|url=http://www.fsf.org/news/2011-free-software-awards-announced|title=2011 Free Software Awards announced|work=Free Software Foundation|date=26 March 2012}}

Matz' demeanor has brought about a motto in the Ruby community: "Matz is nice and so we are nice," commonly abbreviated as MINASWAN.{{cn|date=April 2025}}

Matsumoto is married and has four children. He is a member of the Church of Jesus Christ of Latter-day Saints,{{cite web|title=Hi I'm まつもとゆきひろ (Matsumoto "Matz" Yukihiro)|quote=I am a computer programmer. I designed a programming language called 'Ruby.' I am a Mormon.|url=https://www.mormon.org/matz|work=mormon.org|archive-url=https://web.archive.org/web/20181012135128/https://www.mormon.org/matz |access-date=12 October 2018|archive-date=12 October 2018 }} having performed standard missionary service and become a counselor in the bishopric in his church ward.{{cite web |url=https://cs.byu.edu/article/colloquium-yukihiro-matsumoto |title=Colloquium--Yukihiro Matsumoto |website=BYU |archive-url=https://web.archive.org/web/20171109044433/https://cs.byu.edu/article/colloquium-yukihiro-matsumoto |access-date=9 November 2017|archive-date=9 November 2017 }}

• Ruby (programming language)
• Ruby MRI
• Ruby on Rails

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• [http://www.rubyist.net/~matz/ Matz's web diary] (and [https://translate.google.com/translate?u=http%3A%2F%2Fwww.rubyist.net%2F%7Ematz%2F&langpair=ja%7Cen&hl=en&ie=UTF-8&oe=UTF-8&prev=%2Flanguage_tools translated to English] with Google Translate) {{in lang|ja}}
• [http://www.itconversations.com/shows/detail1638.html Ruby Design Principles talk] from IT Conversations
• [http://www.informit.com/articles/article.aspx?p=18225 The Ruby Programming Language] – An introduction to the language by its own author
• [http://dorai.wordpress.com/2007/08/08/treating-code-as-essay/ Treating Code as an Essay] – Matz's writeup for the book Beautiful Code, edited by Andy Oram, Greg Wilson, O'Reilly, 2007. {{ISBN|0-596-51004-7}} {{ISBN|9780596510046}}

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Category:1965 births

Category:Living people

Category:Free software programmers

Category:Japanese computer programmers

Category:Japanese computer scientists

Category:Japanese Latter Day Saints

Category:People from Osaka Prefecture

Category:People from Tottori Prefecture

Category:Scientists from Osaka Prefecture

Category:Scientists from Tottori Prefecture

Category:Programming language designers

Category:Rakuten

Category:Ruby (programming language)

Category:University of Tsukuba alumni