Having a Good Life by Creating ;)

Having a Good Life by Creating ;)

Start developing your own products.

Products

Ruby on Rails Tutorial in Japanese

for learners

Learn web development from zero to deploy in order to start designing your own product.

Ruby on Rails Guides in Japanese

for developers

Enhance your web service by using 1,600+ pages contents on Ruby on Rails in Japanese.

Partners & Customers

《Community Support》

We think communities are important. As one of community members,
we provide the following programs with non-profit organizations.

📰 Recent news


👥 About us

We are 100% remote team. We work remotely using tech services like GitHub, Zoom, and Google Workspace, etc.

YassLab Team Photos




Photo of Yohei Yasukawa
CEO of YassLab Inc.

Yohei Yasukawa

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He earned a Master of Engineering in Computer Science from Waseda University and studied abroad at Monmouth College in Illinois, USA. Upon returning to Japan, he founded YassLab, a fully remote company specializing in the development of web-based learning materials—most notably the Japanese Rails Tutorial and Japanese Rails Guides—and providing these resources as corporate services for universities and employee training programs.

In addition to his work at YassLab, he co-founded CoderDojo Japan, one of the official regional bodies within the CoderDojo community—a worldwide movement of free, volunteer-led, community-based programming clubs (Dojos) for young people. Today, the CoderDojo community in Japan includes over 200 Dojos nationwide, hosting approximately 1,200 events annually, welcoming more than 62,100 kids to learn to code, and collaborating with over 25 corporate partners.

Motivated by a desire to provide more opportunities for young people to learn not just “how” to create but also “what” to create, he and his colleagues launched the MITOU Junior program in 2016. As of January 2025, this initiative has supported over 110 projects by more than 130 creators under the age of 17, selected from over 850 applications. The program is now recognized as part of the MITOU Programs ecosystem by the Information-technology Promotion Agency, Japan (IPA).

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🏢 Company Profile

YassLab

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Official Accounts

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📮 Contact

Office: CASE Shinjuku, Sankei Bldg 4F, Takadanobaba 1-28-10, Shinjuku-ku, Tokyo, 169-0075

If interested, feel free to contact us.