Having a Good Life with OpenSource
YassLab Logo

Having a Good Life with OpenSource ;)

New web services, with Ruby

We focus on developing Web services by using Ruby, and
keep contributing opensource communities through our businesses.

Continuous Translation System

Improve environments to develop,
by automating tech docs translation.

Ruby on Rails Tutorial in Japanese

[JP] Rails Tutorial

Learn Web Development tutorial by Michael Hartl. Free to read online. You will learn Ruby, Rails, Git, and Heroku by building SNS.

Ruby on Rails Guides in Japanese

[JP] Rails Guides

Japanese official translation of Ruby on Rails Guides over 1,600 pages in ebook. Free to read online, often referred by software engineers when developing with Rails.

《Web Development Support by Ruby》

We provide professinal services to support
developing your Ruby/Rails projects with following skills.

Ruby logo
Ruby / Rails
cloud icon
Heroku / AWS
Agile Web Development image
Agile Web Development

《Community Support》

We think communities are important. As one of community members,
we continuously support and suggest what we can for them like these.

Recent news

Past works

About us

We’re mainly working on Ruby/Rails web development, education, and open-source activities. We have two offices in Okinawa and Tokyo, Japan, and we work remotely using GitHub, Zoom/Appear, Idobata, etc.

YassLab Team Photos

Photo of Yohei Yasukawa
CEO of YassLab Inc.

Yohei Yasukawa

  • Facebook
  • Twitter
  • GitHub
  • LinkedIn
  • Qiita

He obtained the degree of Master in Information and Computer Science from Waseda University, and studied at Monmouth College in Illinois, USA. He founded YassLab company in 2012, 100% remote-work company that focuses on Ruby/Rails projects above.

Beyond the company projects, he is also known as one of co-founders of Okinawa.rb/Okinawa RubyKaigi, CoderDojo Japan, and MITOU for U-17 projects. For such enthusiastic contributions to IT and Education fields in Japan, he was selected as one of persons possessing outstanding capabilities by METI-launched The MITOH Program, TEDxRyukyu speakers, and Outstanding Performance Awards at Fukuoka Ruby Award.

Company Profile



Mail: yohei@yasslab.jp
SNS: GitHub (Most stars), Qiita, Facebook, Twitter, Google+, Wantedly.
Office: CASE Shinjuku, Sankei Bldg 4F, Takadanobaba 1-28-10, Shinjuku-ku, Tokyo, 169-0075

If interested, feel free to contact us.