To cite jpndistrict in publications, please use:

Uryu S (2017). “jpndistirct: Create Japanese Administration Area and Office Maps.” http://github.com/uribo/jpndistrict.

Corresponding BibTeX entry:

  @Misc{,
    title = {jpndistirct: Create Japanese Administration Area and
      Office Maps},
    author = {Shinya Uryu},
    year = {2017},
    url = {http://github.com/uribo/jpndistrict},
  }