Man pages matching name gfusage in section 1:

gfusage.1.en	debian 10 / gfarm-client
gfusage.1.ja	debian 10 / gfarm-client
gfusage.1.en	debian 11 / gfarm-client
gfusage.1.ja	debian 11 / gfarm-client
gfusage.1.en	debian 12 / gfarm-client
gfusage.1.ja	debian 12 / gfarm-client