This Dictionary of Japanese Martial Arts Terms is intended to further the understanding of Students. If you wish to contribute additional terms please email us and animo@toyama-ryu.com.
| Rōmaji | Kanji | Description |
| Dai | 大 | Big, great, vast, large, high. |
| Dai Gokyō | 第五教 | Fifth of the five gokyo series in judo. |
| Dai Ikkyō | 第一教 | First series of gokyo. |
| Dai Jōdan | 大上段 | Raising a sword above one's head (to slay); haughty attitude |
| Dai Ki Haku | 大気迫 | Danish karate style. |
| Dai Nikyō | 第二教 | Second series of gokyo. |
| Dai Sankyō | 第三教 | Third series of gokyo. |
| Dai Yonkyō | 第四教 | Fourth series of gokyo. |
| Daimyō | 大名 | Clan leader. |
| Daishō | 大小 | The katana and the wakizashi. |
| Daishō | 大小 | A traditional matched pair of long and short swords |
| Daitō | 大刀 | Long sword over 2 feet long, worn cutting edge upwards |
| Daki Wakare | 抱分 | High lift and separate. |
| Dame | 駄目 | Don't, bad, not like that |
| Dan | 段 | Black belt grade, section, piece, division. |
| De Ashi Barai | 出足払 | Forward foot sweep. |
| Deai | 出会い | Meeting, rendezvous, encounter. |
| Deshi | 弟子 | Pupil, disciple, apprentice, teacher's student helper. |
| Do | 土 | Soil, earth, element earth. |
| Dō | 胴 | Body, large intestine, body protector. |
| Dō | 道 | Road, way. |
| Dō Jime | 胴絞 | Leg scissors on short ribs, body strangle. |
| Dō Uchi | 胴打ち | A cut to the body. |
| Dodan | 土壇貫 | (1) dirt mound; (2) dirt walls on the inside of the sunken hearth in a tea room; (3) platform made of dirt used to perform executions (decapitations) in the Edo period |
| Dōgiri | 胴切り | Cutting horizontally into the torso (with a sword) |
| Dōjō | 道場 | A training hall for the Japanese martial arts. |
| Dōjō Chō | 道場長 | The head of the dojo. |
| Dōjō Kun | 道場訓 | Rules for conduct in a dojo. |
| Donki | 鈍器 | Blunt weapon |
| Dontō | 鈍刀 | Dull or blunt sword |
| Dōsa | 動作 | Action, movements, motions, bearing, behaviour, manners. |
| Dōshu | 道主 | Head of the way. |
| Dotanba | 土壇場 | (1) last moment; eleventh hour; (2) platform made of dirt used to perform executions (decapitations) in the Edo period |
| Dōtanuki | 同田貫, 胴田貫 | Battle sword similar to a katana with a very thick blade. |
