[2][3] Later she worked as analyst for several international consulting companies and banks like McKinsey and JPMorgan Chase.

[6] In Katsuma's sophomore year at Keio University in Tokyo, she had passed her second stage CPA exam and obtained a position at one of the leading accounting firms in Japan.

In 2003, Katsuma had changed companies again, this time she had decided to work at J.P. Morgan as an analyst.

It was between her work at J.P. Morgan and the founding her website forum for a working mothers titled "Field of Mugi" that grabbed the Wall Street Journal's attention; they subsequently added Katsuma to their list for the "Top 50 women to watch".

[7] In 2018, Katsuma declared that she was in a relationship with and living with another woman, LGBT rights activist Hiroko Masuhara.