御三時[osanji] three-o'clock snack
三鞭酒[shanpen] champagne
球面三角法[kyuumensankakuhou] spherical trigonometry
胸三寸[munesanzun] heart
元三[ganzan] New Year's period (January 1st to 3rd)

五十三次[gojuusantsugi] the 53 Toukaidou stages
向こう三軒[mukousangen] one's next three neighbors
降三世明王[gouzanzemyouou] Trailokyavijaya Vidya-raja
再三[saisan] again and again
再三再四[saisansaishi] repeatedly

一尺[isshaku] approx. 30 cm
滑り尺[suberijaku] slide rule
計算尺[keisanjaku] slide rule
三尺[sanjaku] 3 Japanese feet
三尺の秋水[sanjakunoshuusui] sharpened sword

三尺の童子[sanjakunodouji] mere child
三尺帯[sanjakuobi] waistband
尺貫法[shakkanhou] old Japanese system of weights and measures
尺度[shakudo] linear measure