House of Representatives SMD Shapefile: https://gtfs-gis.jp/senkyoku/
House of Representatives Elections Results: https://www.soumu.go.jp/senkyo/senkyo_s/data/shugiin/ichiran.html
House of Councilors Elections Results: https://www.soumu.go.jp/senkyo/senkyo_s/data/sangiin/ichiran.html
First Level Administrative Divisions Japan: https://maps.princeton.edu/catalog/stanford-np872wp5062
Second Level Administrative Divisions Japan: https://maps.princeton.edu/catalog/stanford-ff095jm2871
Tokyo Legilslature results: https://www.senkyo.metro.tokyo.lg.jp/election/togikai-all/togikai-sokuhou2009/
Tokyo Governor Results: https://www.senkyo.metro.tokyo.lg.jp/election/tochiji-all/tochiji-sokuhou2024/csv
National Election District lookup: https://go2senkyo.com/shugiin
Municipality Shapefile: https://nlftp.mlit.go.jp/ksj/gml/datalist/KsjTmplt-N03-v3_0.html#!
News Organizations:
2021 Election: https://www.nhk.or.jp/senkyo/database/shugiin/2021/
2024 Map: https://www.nhk.or.jp/senkyo/database/shugiin/2024/kaihyomap/?detail=plc0158600#6.75/42.049/142.172
Party Wins: https://www.nhk.or.jp/senkyo/database/shugiin/2024/result/
2022 Election: https://vdata.nikkei.com/election/2022/sanin/kaihyo/#/hirei/1
https://www.nhk.or.jp/senkyo/database/shugiin/2021/open-data/