一刀[ittou] sword
一刀彫り[ittoubori] one-knife carving
一刀両断[ittouryoudan] cutting in two with a single stroke
印刀[intou] seal-engraving knife
円刃刀[enjintou] round-edged scalpel

快刀[kaitou] (literary) sharp sword
快刀乱麻[kaitouranma] solving a problem swiftly and skillfully
懐刀[futokorogatana] confidant
儀刀[gitou] ceremonial sword
軍刀[guntou] saber

萬歳[manzai] door-to-door comedic duo
萬葉集[manyoushuu] Manyoushuu (famous 8thC poetry)
千客萬來[senkakubanrai] flood of customers

萬刀[mantou] ninja weapon disguised as a pair of garden shears
三河萬歳[mikawamanzai] style of manzai originating in the Mikawa region in Aichi prefecture