Nishida was first elected to the House of Councillors in
2004 as the Komeito candidate in
Saitama at-large district. In 2013, Nishida became secretary general for the Komeito caucus in the House of Councillors. The following year he was promoted to chairman of the Komeito caucus in the House of Councillors and he continued in the post until 2024, while also serving concurrently as chairman of the election strategy committee from 2020 to 2021 and from 2022 to 2024. Nishida was appointed secretary general when
Keiichi Ishii became party president in September 2024. == References ==