For three years from 2002 to 2005, Otsu appeared as Akira Ikegami's daughter in NHK's "Weekly Children's News".
[3] On January 13, 2023, NHK party held a press conference announcing their 36 candidates for the 2023 Japanese local elections.
In the press conference, it was announced that Otsu will be the party's candidate for the Meguro City Assembly.
Seijika Joshi's candidate for the election was Juna Ichikawa, but decided to drop out in favour of Otsu.
As of December 2023, Japan's Ministry of Internal Affairs and Communications has not recognized the change of the party leadership.