| Term | Kanji | Description |
| Sai | 釵 | A type of trident popular in Asia, middle prong is longest. aka Tekpi |
| Sanchin | 三戦 | Kata: Three Battles |
| Sanchin Dachi | 三戦立ち | Short stance where the front foot is slightly turned inward |
| Sanseiru | 三十六 | Kata: Thirty Six |
| Seisan | 十三 | Kata: Thirteen |
| Shiko Dachi | 四股立ち | Square Stance |
| Shitoryu | 糸東流 | Itosu/Higashionna Style - Founded by Mabuni Kenwa |
| Shizen Dachi | 自然立ち | A type of short front stance |
| Shorinryu | 小林流 | Small Forest (Kobayashi) style - Founded by Chibana Choshin |
| Shorinryu | 少林流 | Small Forest (Sukunaihayashi) style - Attributed to Kyan Chotoku |
| Shorinryu | 松林流 | Small Forest (Matsubayashi) style - Founded by Nagamine Soshin |
| Shuchu | 集中 | Focusing the Mind |
| Sochin | 向戰 | Kata: Direction of Battle (aka 壯鎭) |
| Soke | 宗家 | An inheritor of a household, designated by a koseki tohon |
| Suparinpe | 壱百零八 | Kata: One Hundred and Eight (108) |
