House of Representatives in Japan since the 2017 general election. Update is welcomed. I edited it on https://tools.wmflabs.org/parliamentdiagram/parliamentinputform.html . Data source (Japanese) of the first version is from the House's official website. Map is as of 5 May 2018.
Parliamentary group (seats)  Liberal Democratic Party (284)
  Komeito (29)
  Kibo no To (Party of Hope) (2)
  Democratic Party for the People (39)
  Nippon Ishin no Kai (11)
  Independent (15)
  Constitutional Democratic Party of Japan (57)
  Mushozoku-no-kai (mainly members of The Democratic Party, Minshinto) (12)
  Liberal Party (2)
  Social Democratic Party (2)
  Japanese Communist Party (12)
Own work
Extrahitz