alright here is what I can contribute. I will list the name any variation in recipe and a source for the yeast balls of this country if available.
A few notes on yeast Balls. Apparently in most stores if you walk in and ask about making rice wine they will not know what you are looking for. These get called things they are not all the time in these stores. I just realized in my search yesterday I had some in my hand and put them back because they were listed as Rice Cakes. They are also called Dried Yeast, Yeast Ball etc. Apparently they are known to most Asian market store owners as a bread making product or for making fermented stick rice treats. Chinese yeast ball is also called Ragi.
China - Bai Mi Jiu - exact recipe listed on this forum.
Huang Jiu - age above recipe in earthen jar in fridge for 2 years. it turns yellow
http://www.asiansupermarket365.com/Shanghai-Rice-Cakes-p/hshrcilj.htm
Thailand - Sato - same as above except they fill the jar with water to the top and only let it sit for a week. At this point it is sweet and drinkable. It says it can be left longer but will become less sweet, drier, and more alcoholic.
http://importfood.com/nrhf0401.html
Vietnam - Cơm Rượu - same as above except the wine is served with the rice formed into balls floating in it while it is still young and sweet. The recipes say to use either Vietnam or Chinesse yeast Balls as apparently the Vietnamesse versions are hard to find in the United States. If Using Hong Kong Yeast: 1 wine yeast ball (size of a quarter) to 1kg white or brown glutinous rice If Using Vietnamese Yeast: 2 wine yeast balls (size of a dime) to 1/2kg white or brown glutinous rice
Korea - Makgeolli - same as above but can have wheat added into it.
Gamju or dansul - It is made from steamed rice, to which water and yeast-cake are added. It is then fermented for several hours in a rice cooker at 60 °C and served. It is normally served in a kettle, and poured into bowls.
Sumatra, Sulawesi, Borneo, and parts of Malaysia - Tuak- Same as above until the rice floats. Usually 3-10 days. Once rice floats: Sugar is added to boiling water (typically 1 kg of sugar to every 2 liters of water, but the mix can be varied depending on the preference for the level of sweetness) and the cooled syrup is added to the fermented mixture. The Tuak is ready to be served or as with the locals, it is preferably left to stand for another 10 days for the taste to mature. The longer the Tuak is kept, the more matured it would become. Tuak can be stored for long period of time, over the course of time the colour darkens and an aroma of honey develops. Provided the content of either alcohol or sugar is high enough, the rice wine can be stored for many years in sealed bottles.
Japan - Doburoku - same as above but has some water added into it when jarred.
I spent just over an hour trying to find more sources for yeast balls from each of the countries above. I am calling it good for now. In conclusion a lot of these countries use the yeast balls from china. Most of the yeast balls are produced there. I found mention of yeast ball production in japan and in Vietnam. A lot of the smaller countries use homemade balls that are not so easy to make Safely due to the use of molds in them.