Winter Golf in Tokyo: A Guide for Weather Wimps

It's late December and I haven't played golf in about a month.  It's time to work up a game.  It's a little harder getting a foursome now since some of my golf friends refuse to play in winter. I view these golfers as weather wimps who have gone into golf hibernation caves.  "Enjoy the bath," one wimp tells me after declining to play with me just after the New Year's holiday.  I manage to find a group that will play, however, and the weather forecast is for a day of sunshine.