Mikiko has experienced the combined area of technology, business, and law as a system engineer and as a practicing attorney. She worked on development of accounting system at IBM Japan from 2001. She passed the Bar Examination in 2005 and joined the Legal Training and Research Institute in 2006. As a practicing attorney, she joined AZX professionals group in 2007, where she experienced providing legal services mainly for the venture companies. In 2009, she joined Uchida & Samejima Law Firm as a practicing attorney.
She graduated from University of Tokyo in 2001 (Bachelor of Engineering).