It's like fermenting corn, you cook it and ferment the mash. I'm thinking about trying an all-corn beer by cooking the crushed corn with hops, then fermenting the whole mess. The whiskey sites I've looked at, say the corn can take three weeks, which is about what a sake takes.
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk