Man pages matching name koi8-u in section 7:

koi8-u.7.en	debian 10 / manpages
koi8-u.7.ja	debian 10 / manpages-ja
koi8-u.7.en	debian 11 / manpages
koi8-u.7.es	debian 11 / manpages-es
koi8-u.7.fr	debian 11 / manpages-fr
koi8-u.7.ja	debian 11 / manpages-ja
koi8-u.7.en	debian 12 / manpages
koi8-u.7.de	debian 12 / manpages-de
koi8-u.7.es	debian 12 / manpages-es
koi8-u.7.fr	debian 12 / manpages-fr
koi8-u.7.ja	debian 12 / manpages-ja
koi8-u.7.ru	debian 12 / manpages-ru