i - ro - ha- The first three letters of the old Japanese alphabet. For the curious, the first seven are i - ro - ha - ni - ho - he - to.
Tokaido- The old (walking) path between Tokyo and Kyoto.
Nyudo- A monk.
Nisoku-Sanmon- So cheap that it's as cheap as dirt.
Odawara- One of the 53 steps on the Tokaido trail. In modern-day Japan, Odawara is a city in Kanagawa prefecture.
yakuza- The mafia.
Oni-gokko- Literally "playing demon." The american version is the game of "tag," where one person is the "oni/demon" ("it"), and chases after others... And whoever is tagged by the oni/it is the new oni/it..
Mamushi- It's just one kind of pit viper. Poisionous, but its meat/extract/etc. is supposed to give stamina of all sorts (including in the bedroom).
