@findex list-character-sets
@kbd{M-x list-character-sets} displays a list of all supported
charsets. The list gives the names of charsets and additional
-information to identity each charset; see the
-@url{http://www.itscj.ipsj.or.jp/ISO-IR/, International Register of
-Coded Character Sets} for more details. In this list,
+information to identity each charset; for more details, see the
+@url{https://www.itscj.ipsj.or.jp/itscj_english/iso-ir/ISO-IR.pdf,
+International Register of Coded Character Sets} maintained by
+the @url{https://www.itscj.ipsj.or.jp/itscj_english/,
+Information Processing Society of Japan/Information Technology
+Standards Commission of Japan (IPSJ/ITSCJ)}. In this list,
charsets are divided into two categories: @dfn{normal charsets} are
listed first, followed by @dfn{supplementary charsets}. A
supplementary charset is one that is used to define another charset
;;; Remarks
-;; The ISO-IR registry is at http://www.itscj.ipsj.or.jp/ISO-IR/.
+;; The ISO-IR registry is maintained by the Information Processing
+;; Society of Japan/Information Technology Standards Commission of
+;; Japan (IPSJ/ITSCJ) at https://www.itscj.ipsj.or.jp/itscj_english/.
;; Standards docs equivalent to iso-2022 and iso-8859 are at
;; http://www.ecma.ch/.