“a hundred days of sermonizing, one fart” → a metaphor for how something that one has put great effort into can come to nothing after even a slight mistake, much as a hundred days of serious spiritual study can be lost to the winds

paper bag

safety razor

someone/something should be avoided (to keep troubles away)

a cuckoo / (figuratively) loneliness, dreariness, desolateness

Alternative spelling of 紙巻きたばこ (“cigarette”)

Alternative spelling of 紙巻きたばこ (“cigarette”)

Obsolete spelling of 紙巻きたばこ (“cigarette”)

Alternative spelling of 紙巻きたばこ (“cigarette”)

a cigarette