Man pages matching name fsck.reiser4 in section 8:

fsck.reiser4.8.en	debian 10 / reiser4progs
fsck.reiser4.8.fr	debian 11 / manpages-fr
fsck.reiser4.8.en	debian 11 / reiser4progs
fsck.reiser4.8.fr	debian 12 / manpages-fr
fsck.reiser4.8.en	debian 12 / reiser4progs