After majoring in mathematics at School of Education, Waseda University, Mariko entered Omiya Law School. After passing the national bar exam and completing legal training at the Legal Training and Research Institute, she became registered as a lawyer and joined Miyamoto International Lawyers in 2011. She practices in such areas as general corporate, employment, education, traffic accidents, bankruptcy and domestic matters.
Daini Tokyo Bar Association (Japan, 2011)
Waseda University (Tokyo, Bachelor of Science)
Omiya Law School (Saitama, Juris Doctor)