[5] In the 2014 general elections, Kotani ranked for the first time, placing 61st with 12,913 votes.
[8] Her future dream is to be someone who appears frequently on variety shows, commercials and information programmes.
[10] On February 4, 2016, Kotani graduated from NMB48 Team N and changed her stage name to Riho Miaki (三秋里歩).
[11] On August 20, 2018, she became a starting member of the Sakamichi Series idol group Yoshimotozaka46.
[12] On March 23, 2020, Miaki announced her engagement to fellow Yoshimotozaka46 member SHUN SHUN CLINIC P [ja] and departure from Yoshimoto Kogyo, her office at the time.