Do hosts accept WWOOFers during winter?

Yes, many do.  Many of our hosts accept WWOOFer all year round.  Many of our hosts are places other than farms.  The information we provide to members includes this kind of information on each host.
WWOOF Japan  Honcho 2-jo, 3-chome 6-7, Higashi-ku, Sapporo, 065-0042  JAPAN
E-mail: Contact Form   Fax number from within Japan: (03) 4496-6370    Fax number from outside Japan: +81 3 4496-6370

WWOOF Japan LLP (Limited Liability Partnership)