To start WWOOFing in Japan as a WWOOFer:
2. Complete the registration, and pay 5,500 yen.
That’s all. 
After registration, you will need to fill in your profile, and upload your photo. 
Please read 'Become a WWOOFer’ and 'How to Pay’ for details about WWOOFing in Japan!

Hotmail email problems:
Some hotmail users are not receiving our emails, due to the hotmail filter system. If you don’t receive our email after sending your registration, please use a different email address.