To cite package ‘shikakusphere’ in publications use:

  Kato A (2024). _shikakusphere: Miscellaneous Functions for Japanese
  Mahjong_. R package version 0.0.3.9003,
  <https://github.com/paithiov909/shikakusphere>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {shikakusphere: Miscellaneous Functions for Japanese Mahjong},
    author = {Akiru Kato},
    year = {2024},
    note = {R package version 0.0.3.9003},
    url = {https://github.com/paithiov909/shikakusphere},
  }