[note 1] Then, she formed a regional party: Tomin First no Kai, which was founded for the 2017 metropolitan election.

The Komeito party supported Governor Koike in the metropolitan council, even though they were part of the coalition government with the LDP at the national level.

[9] This led to the split on 2 October 2017 of the Constitutional Democratic Party, which consists of left-leaning and liberal DP politicians whom Koike had rejected as Kibō no Tō candidates.

[10][11] It was reported that the Kibō no Tō is tightly connected to some far-right organizations like Ganbare Nippon founded by Satoru Mizushima.

[12] The support rate of Kibō no Tō then dramatically decreased before the election and finally it only won 50 seats, even lower than the newly-founded Constitutional Democratic Party of Japan.

On 10 October 2021, Nakayama, the only member of the Diet, did not run for the next House of Representatives election and indicated his intention to retire from politics.