Kazuyo Katsuma is a charismatic economic analyst, best-selling writer and working mother, who has regular columns in newspapers and appears frequently in magazines and on TV shows. Katsuma is considered one of Japan's foremost writers on the subjects of self- development skills for people in business, work-life balance and personal finance.

By drawing both on her experience as an accountant, business consultant and securities analyst in foreign financial firms and on the trials and tribulations of being a mother of three, 40-year-old Katsuma has sold a combined total of more than 2 million copies of the 14 books she has written. Some of her titles have also been translated and sold in South Korea, China and Taiwan.

One of her books, "Kouritsu ga 10 bai appu suru Shin Chiteki Seisanjutsu" ("A Way to Live That Improves Efficiency Tenfold") has been sold 250,000 copies since it was published in December 2007.