As for kanji for personal names, the circumstances are somewhat complicated. "Jōyō kanji" and "jinmeiyō kanji" (an appendix of additional characters for names) are approved for registering personal names. Names containing unapproved characters are denied registration. However, as with the list of "jōyō kanji", criteria for inclusion were often arbitrary and led to many common and popular characters being disapproved for use. Under popular pressure and following a court decision holding the exclusion of common characters unlawful, the list of "jinmeiyō kanji" was substantially extended from 92 in 1951 (the year it was first decreed) to 983 in 2004. Furthermore, families whose names are not on these lists were permitted to continue using the older forms.