Man pages matching name ypwhich in section 1:

ypwhich.1.ja	debian 10 / manpages-ja
ypwhich.1.en	debian 10 / nis
ypwhich.1.ja	debian 11 / manpages-ja
ypwhich.1.en	debian 11 / yp-tools
ypwhich.1.ja	debian 12 / manpages-ja
ypwhich.1.en	debian 12 / yp-tools