Soybean Beer?

I too am looking to possibly use soy to brew. I have recently learned that gluten free diets really do make a drastic difference with Rheumatoid arthritis. The sorghum beers are not my favorite substitute. It make sense to me that you could use soy beans since several products are made from fermenting them, soy sauce and miso for starters. I know in Japan all the major brewers have developed a line of soy beer. If anyone has links to home brewing with it I would be grateful. I’ll still brew but it kind of stinks not being able to drink my own concoctions.