Educational Renaissance / Gaudia challenges Kumon Yuka Matsumoto and Atsushi Miyazaki Yomiuri Shimbun Staff Writers The following are excerpts from The Yomiuri Shimbun's Educational Renaissance series. This part of the series focuses on increasing competition among juku cram schools. The Kumon juku chain was launched in 1958 to offer a self-learning method developed by high school math teacher ..