To cite package ‘shikakusphere’ in publications use:

Kato A (2026). shikakusphere: Miscellaneous Functions for Japanese Mahjong. R package version 0.1.4, https://github.com/paithiov909/shikakusphere.

Corresponding BibTeX entry:

  @Manual{,
    title = {shikakusphere: Miscellaneous Functions for Japanese
      Mahjong},
    author = {Akiru Kato},
    year = {2026},
    note = {R package version 0.1.4},
    url = {https://github.com/paithiov909/shikakusphere},
  }