Maintainer: ‘Joe Suzuki <j-suzuki@sigmath.es.osaka-u.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Joe",
                      family = "Suzuki",
                      role = c("aut", "cre"),
                      email = "j-suzuki@sigmath.es.osaka-u.ac.jp"),
               person(given = "Jun",
                      family = "Kawahara",
                      role = "aut"))
as necessary.
Maintainer: ‘Joe Suzuki <j-suzuki@sigmath.es.osaka-u.ac.jp>’

No Authors@R field in DESCRIPTION.
Please add one, modifying
  Authors@R: c(person(given = "Joe",
                      family = "Suzuki",
                      role = c("aut", "cre"),
                      email = "j-suzuki@sigmath.es.osaka-u.ac.jp"),
               person(given = "Jun",
                      family = "Kawahara",
                      role = "aut"))
as necessary.