Naoki Inose was forced to resign in 2013 after admitting he failed to declare a Y50m donation from a hospital magnate before his election .
Naoki Inose served as governor of Tokyo before Mr Masuzoe and was a key figure in the city 's bid to host the Olympics .
Naoki Inose , who served as governor of Tokyo before Mr Masuzoe and was a key figure in the city 's bid to host the Olympics , was forced to resign in 2013 after admitting he failed to declare a Y50m donation from a hospital magnate before his election .