I have brewed 10 batches now in the mid to high 70's because I have no fermentation temp control. Don't anybody yell at me, but except for a couple I haven't even chilled in a tub with icewater or used the wet t-shirt method.
I'm sure my beer is going to get a lot better when I find a chest...
Instructions and ordering specialty ingredients here
Vision Brewing's Homebrew Sake Instruction Page
I haven't tried this, sounds like too much of a pain in the neck for something that I would probably not be able to pull off anyway