本の[honno] mere
異本[ihon] different edition
一坪本社[hitotsubohonsha] small company headquarters located in Tokyo simply for name value
一本[ippon] one long cylindrical thing
一本気[ippongi] single-minded (esp. personality or person)

一本橋[ipponbashi] (a) log bridge
一本建て[ippondate] (a) single standard
一本松[ipponmatsu] solitary pine tree
一本杉[ipponsugi] (a) solitary cryptomeria tree
一本槍[ipponyari] guiding principle

謄写[tousha] copy
謄写器[toushaki] copier
謄写版[toushaban] mimeograph

謄本[touhon] certified copy
戸籍謄本[kosekitouhon] official copy of the family register
証明謄本[shoumeitouhon] attested copy