DIAMOND

Diamond, Inc. was founded by Kenkichi Ishiyama with the publication of the first issue of Economic Magazine Diamond in May 1913. The statement commemorating the first issue of the magazine reveals his steadfast determination to "contribute to socioeconomic development," "speak the truth through numbers," and "adopt a global perspective. Diamond, Inc. has been adapting to the changes in the needs of the time by expanding the topics that it covers to include self-help, education, and practical guidance and currently publishes books in a wide variety of genres as well as magazines such as Diamond Weekly, Diamond Harvard Business Review, and Diamond ZAi (Wealth). It has also developed online media such as "Diamond Online" and "ZAi Online" and offers seminars and educational services.