Maintainer: ‘Takayuki Kawashima <t-kawa@ism.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Takayuki",
                    family = "Kawashima",
                    role = c("aut", "cre"),
                    email = "t-kawa@ism.ac.jp")
as necessary.
Maintainer: ‘Takayuki Kawashima <t-kawa@ism.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: person(given = "Takayuki",
                    family = "Kawashima",
                    role = c("aut", "cre"),
                    email = "t-kawa@ism.ac.jp")
as necessary.