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!