However, Ota defected from the DPJ to People's Life First and then the Tomorrow Party of Japan.

He held the district in 2014 and 2017, both times defeating Koki Okabe who was in the DPJ and then merged into Kibō no Tō.

This also made Baba, along with Shin Tsuchida, the first members of the Diet to be elected that were born in the Heisei era.

However, the CDP opted to have Kōichirō Genba move from the 3rd district to the 2nd, while Baba agreed to run as the number one candidate on the proportional list.

Genba safely defeated Taku and a JCP candidate with a majority, as the junior Nemoto was revived proportionally.