For decades, the big breweries dominated Japan's beer market. But in the last few years, so-called "craft beers" from small producers have been in the limelight. Now Japan's craft beers are even winning acclaim on the world stage. What lies behind their appeal? We explore the world of Japanese craft beer. Our expert guest is Ikuko Noda, a "beer journalist and ambassador" who has written many books on the subject. And in Plus One, we'll see the cutting-edge of the craft beer scene.