About Katz Ueno ( about.me )

Katz currently works as the Chief Communications Officer at Macareux Digital, Inc. (Formerly concrete5 Japan, Inc.) to spread the word of Concrete CMS, a free open source contents management system.

He is helping a number of Japanese corporations to runs their website and web services.

As Japan’s best English social media aggregator, Katz funded JapanExp and YokosoNews to provide travel, culture and lifestyle information of Japan.

Katz was born and raised in Yokkaichi, Mie, Japan, then moved to Los Angeles to pursue his dream to become a filmmaker. After graduating from California State University, Long Beach, he has worked on dozens of independent film projects as well as national TV programs as a producer; in post-production, and sound designer.

Then, he started working for several publishing companies. He was self-taught as a web designer. In 2006, he started working for Entertainment Today, an entertainment weekly since 1967, then he became the editor-in-chief in 2007.

In 2009, he joined an open source software project, Concrete CMS, to start translating and marketing in Japanese.

In 2010, after years of preparation, he launched a social media web project, JapanExp, to explore, express and export Japan. As one of its projects, he launched YokosoNews to introduce travel, lifestyle and cultural information of Japan to, and welcome people to visit from overseas.

In 2011, during the aftermath of March 11 East Japan Earthquake, he immediately started the emergency live stream via Ustream which caught the attention of one million viewers within a month. Those viewers include: ABC; Washington Post; Al Jazeera; German Public Radio; Russia Today and other media outlets.

Currently he also runs CoderDojo Owari, an open source programming club for youth.

He organized other meetups such as Web Marketing Meetup Nagoya (Mautic Meetup Nagoya), and Tech IT ALL Nagoya, and the member of WordPress Meetup Aichi (where he met his wife), and JAWS UG Nagoya (AWS User Group – Japan).

He also has AWS Solution Architect certificates & loves jogging. He usually runs 300km every month.

He’s always wanted to help many people and has been looking for new ventures as the fast paced web and media world evolves.



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About this blog & Disclaimer

This is Katz’s personal blog site. I’ll write anything I want. And sometime I use this blog as draft for YokosoNews article. Since some articles are “draft”. It could be lack of resources and may not contain correct or accurate information.

Katz is not intend to provide inaccurate information, but sometime, you need to tell stories as much as possible without enough provision or editorial supervision.

Please help me fix my grammar.




Macareux Digital, Inc.




Social Media


Twitter (English)



Open Source

Concrete CMS

Concrete CMS Japan

CoderDojo Owari