is a Japanese [[businessperson|businesswoman]] and author of several best selling books, with sales numbers in the tens of millions. She writes mostly about [[self management]], [[work-life balance]], [[gender equality]] and how women can become more successful. She concentrates especially on optimizing thought processes and increasing productivity.
She graduated from Keio University School of Commerce and the Waseda University Graduate School with a master's degree in finance. Later she worked as analyst for several international consulting companies and banks like McKinsey and JPMorgan Chase.
Katsuma was nominated as one of "The 50 Women to Watch 2005" by The Wall Street Journal. She was placed in the "Advocates" section, which means that she works to improve the lives of other women.