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

上筵[uwamushiro] thin padded mat laid on the tatami
花筵[hanamushiro] mat with a floral or bulrush pattern
針の筵[harinomushiro] bed of nails
藁筵[waramushiro] straw mat
薦筵[komomushiro] mat of woven wild rice leaves

粗筵[aramushiro] loosely woven mat
離筵[rien] parting party
法筵[houen] preaching place
法の筵[norinomushiro] preaching place