"Web application using Ruby on Rails (not limeted for PC, web application for mobile is also welcome.)
If Ruby on Rails is used for building a web service, there's no limitation to use other softwares and modules."

The competition starts from July 2 to Sep 25.
the first price a new application is 1,000,000 Japanese Yen (about8,300US$) & extra prize are sponsored by DRECOM (I think most guys here ever visited DRECOM ^^).

Check out more detail [here]

GOOD LUCK!!