One of the saddest things is to have a patient mention they have IBS at the end of a visit as if it were something like a curse. IBS simply means that no organic (big ulcers) illness was found in the bowel, which is a good thing. But many conventional doctors are still under the impression that IBS is a mental condition, when mental health treatments don't work and a variety of functional disorders (malabsorption and fermentation of various sugars, for one) are clearly involved in a percentage of cases. I've posted a page on IBS at http://www.maloneymedical.com/ to give an overview of some of the research. Anyone who has a strong stomach can watch the following video (mostly shots of colonoscopies before and after dietary change). Colonoscopies with dietary change. Dr. Shinya promotes a variety of enzymes and Kangen water (think alkaline water with minerals added.)
If I were to get a book from Dr. Shinya, it would be his older work on colonoscopies, not his newer stuff on microbes and enzymes. Colonoscopy: Diagnosis and Treatment of Colonic Diseases. He's done a lot more research in that area.