Man pages matching name rcsmerge in section 1:

rcsmerge.1.ja	debian 10 / manpages-ja
rcsmerge.1.en	debian 10 / rcs
rcsmerge.1.ja	debian 11 / manpages-ja
rcsmerge.1.en	debian 11 / rcs
rcsmerge.1.ja	debian 12 / manpages-ja
rcsmerge.1.en	debian 12 / rcs