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Before the creation of this district, Fuchu was part of the 18th district, Tama was split between the 21st and 23rd districts, and Inagi was split between the 21st and 22nd districts.
"総務省|令和4年9月1日現在選挙人名簿及び在外選挙人名簿登録者数" [Ministry of Internal Affairs and Communications - Number of registered voters as of 1 September 2022] (in Japanese). Archived from the original on 2022-12-28. Retrieved 2023-01-04.