NICE introduces about 3,000 workcamps in about 100 countries organized by partner organizations.
The projects are held all through the year (Majority is Jun.-Sep.).
You have three ways to get the project information;

A) To see the Japanese page with help of your friends to translate
B) To ask NICE to send the English information by e-mail for specific the countries
C) To see the websites of the workcamps organizations in USA