Design & IT Consulting


Design & IT Consulting

Japanese / Enligsh



We create your website and support your IT problems.


  • Creating and managing your website
  • Designing of metal accessories including key holder, badge
  • Designing company logo
  • Designing business card




About me


I majored Physics and game theory and graduated from Waseda university, then I joined NEC and worked as a software developer for 8 years.

In 2014 I started the web service HiraganaNinja to teach Japanese language and culture.

In 2015 I joined Sakamoto Metal Accessory and  design the product of keychain, badge and other metal accessories.

I am LINE sticker creators and released 3 kind of Ninja stickers.

HiraganaNinja is a character I created. He is a great Ninja but has low motivation for work. He is a city boy and you can sometimes find him in Cafe.





I released 2 Android Apps for Japanese learners. You can download here.

My hobbies are marathon, climbing and traveling. In Japan there are hundreds of beautiful mountains.This photo is the top of Mt. Fuji at the time of sunrise.

I finished Tokyo Marathon in 2013 and the time was 4 hours 24 minutes. Also I finished Rock and roll marathon at San Diego, California.

On the top of Mt. Fuji


My creation


Contact us

mitsuo   代表 坂本 光雄

電話     03-3235-0226