Stomach wrote:...Tsingtoa is made with rice...
So is practically every Budweiser/Anheuser-Busch product.
Rice is a cheap source of fermentable sugar, but is tasteless and produces a very thin body. It's up to you how much to use, but realize it's going to eliminate any possibility of a full-bodied, malty beer. Also, you can't just mash it with your barley malt. You must gelatinize/cook it separately first, with water over low heat just as you would for eating, then stir it into your mash tun and continue with normal all-grain steps. If you stick to small percentages of rice, you can jack up the alcohol percentages of your regular recipes without sacrificing too much authenticity.
Yes, you can make rice wine (sake) as well, but it requires special sake yeast, or at least added enzymes because standard brewer's yeast isn't very effective at fermenting 100% rice recipes.