戸口 is read as とぐち (toguchi) and means door.
とぐち
toguchi
ここうちょうさ
national census
きりどぐち
small garden gate
せどのうまもあいくち
even an unruly horse can be tamed
ひとのくちにはとがたてられない
you can't control what people say
ひとのくちにとはたてられず
people will talk
せけんのくちにとはたてられぬ
こうべやまぐちぐみ
Kobe Yamaguchi-gumi (yazuka syndicate)
と
door (esp. Japanese-style)
こせき
census
こすう
number of households
こがい
open air
こべつほうもん
door-to-door visit