| Go no sen | 後 の 先 | Counter attack | |
| Gogo no sen | 後 後 の 先 | counter counter attack | |
| O-Sensei | 大 先 生 | great teacher, used to refer to the founder of Aikido, Morihei Ueshiba | |
| Sempai | 先 輩 | senior student |  |
| Sen no sen | 先 の 先 | a defensive initiative launched simultaneously with the attack | |
| Sensei | 先 生 | born before, teacher, master | |
| Sensei ni rei | 先 生 に 礼 | bow to the teacher | |
| Sensen no sen | 先 先 の 先 | an initiative launched in anticipation of an attack where the opponent is fully committed to their attack | |
| Senshin | 先 心 | Purified Mind | |
| Wakasensei | 若 先 生 | Young teacher; commonly refers to the son of a master of any art before he becomes the successor. | |