Well I'll admit that's the first time I've seen that recipe not being billed as a recipe for sake. You may or may not enjoy the end result, but I would like to correct you on one matter: This recipe will not yield something equivalent to "whisky potency." Whisky is generally around 40% alcohol by volume, while the maximum this recipe will yield will be around 16% ABV. It may taste very alcoholic, but that's due to higher weight alcohols known as fusels that are produced by yeast when allowed to ferment at higher temperature ranges. Those are the same compounds that cause hangovers, so caution is advised.
If you ever want to try your hand at making real sake, click the link in my sig.