| Subject | English | Japanese |
| comp. | n bi-directional CATV | 双方向ＣＡＴＶ |
| gen. | bi-directional microphone | 両指向性マイクロホン (ryōshikōsei-maikurohon) |
| el., sec.sys. | blocking directional comparison protection | 阻止方式オーバーリーチ保護 |
| gen. | directional absorptivity | 指向性吸収率 |
| tech. | directional angle | 方向角 (hōkōkaku) |
| phys. | directional antenna | 指向性空中線 (shikōsei-kūchūsen) |
| gen. | n directional antenna | 指向性アンテナ (shikōsei-antena) |
| phys. | directional characteristic | 指向特性 (shikō-tokusei) |
| tech. | directional characteristics | 指向特性 (shikō-tokusei) |
| el., sec.sys. | directional comparison protection | 方向比較保護 |
| el., sec.sys. | directional comparison protection | 非ユニットパイロット保護 |
| tech. | directional connection interchange | 直結インターチェンジ (ちょっけつインターチェンジ) |
| railw., sec.sys. | directional control | 方向制御 (ほうこう・せいぎょ) |
| tech. | directional control valve | ダイレクショナル•コントロール弁 (ダイレクショナル•コントロールぺん) |
| gen. | directional control valve | 方向制御弁 |
| antenn. | directional coupler | 方向性結合器 (hōkōsei-ketsugōki) |
| phys. | directional derivative | 方向微分係数 (ほうこう・びぶん・けいすう) |
| light. | directional effect | スタイルズｰクロフォード効果 |
| light. | directional effect | 第1種のスタイルズｰクロフォード効果 |
| light. | directional emissivity of a thermal radiator, in a given direction | 方向放射率 熱放射体の、ある与えられた方向に対する |
| gen. | directional emittance | 指向性放射率 |
| gen. | directional factor | 重方向率 |
| phys. | directional filter | 方向フィルタ (hōkō-firuta) |
| el., acoust. | directional gain | 指向指数 (しこうしすう) |
| el., acoust. | directional gain | 指向性利得 (しこうせい・りとく) |
| gen. | directional gyro | 飛行方位計 |
| gen. | directional gyro | 定針儀 (teishingi) |
| tech. | directional interchange | 直結型インターチェンジ (ちょっけっがたインターチェンジ) |
| tech. | directional island | 誘導島 (ゆうとうとう) |
| comp., MS | directional light | 指向性ライト (A light source that is attached to a frame but appears to illuminate all objects with equal intensity, as if it were at an infinite distance from the objects. Directional light has orientation but no position, and it is commonly used to simulate distant light sources, such as the sun) |
| comp. | n directional light source | 平行光源 |
| light. | directional lighting | 指向性照明 |
| comp., MS | directional map | 道路地図 (A map created with transportation and mass transit shapes, such as highways, parkways, intersections, road and street signs, routes, railroad tracks, transit terminals, rivers, and buildings) |
| gen. | n directional marker or indicator | ↑ |
| gen. | n directional marker or indicator | ← |
| gen. | n directional marker or indicator | 矢印 ichi1 news2 nf39 (やぢるし) |
| gen. | n directional marker or indicator | ↓ |
| gen. | n directional marker or indicator | → |
| el., acoust. | directional microphone | 指向性マイクロホン (shikōsei-maikurohon) |
| antenn. | directional null | 無指向性 (むしこうせい) |
| antenn. | directional-null antenna | 無指向性アンテナ (mushikōsei-antena) |
| gen. | directional spreading parameter | 方向集中度 |
| el., acoust. | directional pattern | 指向性パターン |
| tech. | directional pavement marking | 方向路面標示 (ほうこうろめんひょうじ) |
| antenn. | directional phase changer | 非可逆移相器 |
| antenn. | directional phase-shifter | 非可逆移相器 |
| gen. | directional power relay | 電力方向継電器 (denryoku-hōkō-keidenki) |
| el., sec.sys. | directional protection | 方向保護 |
| phys. | directional radiation | 指向性放射 (しこうせい・ほうしゃ) |
| phys. | directional reception | 指向性受信 (しこうせい・ぢゅしん) |
| phys. | directional reception | 指向受信 (shikō-jushin) |
| gen. | directional reflectance | 指向性反射率 |
| el., meas.inst. | directional relay | 方向継電器 (hōkō-keidenki) |
| tech. | directional roadway marking | 方向路面標示 (ほうこうろめんひょうじ) |
| gen. | directional selection | 定方向選択 |
| gen. | directional selectivity | 方向選択性 |
| tech. | directional separator | 方向分離带 (ほうこうぶんりたい) |
| tech. | directional sign | 方向標識 (ほうこうひょうしき) |
| gen. | directional solidification | 方向性凝固 |
| gen. | directional spectrum | 方向スペクトル |
| gen. | directional spreading function | 方向関数 |
| gen. | directional spreading method | 方向分散法 |
| gen. | directional stability | 方向安定 (hōkō-antei) |
| phys. | directional transmission | 指向送信 (shikō-sōshin) |
| railw., sec.sys. | directional treadle | 方向検知トレッドル |
| gen. | directional valve | 指向性弁 |
| gen. | directional valve | 切換弁 (kirikaeben) |
| tech. | directional water supply system | 直結給水方式 (ちょっけっきゅうすいほうしき) |
| gen. | doubly-directional waves | ニ方向波浪系 |
| tech. | major directional desire line | 総合希望線 (そうごうきぼうせん) |
| tech. | non-directional microphone | 無指向性マイクロホン (mushikōsei-maikurohon) |
| gen. | non-directional sound source | 無指向性音源 |
| gen. | adj-no omni-directional | 無指向性 (microphone, etc, むしこうせい) |
| gen. | omni-directional vehicle | 全方向移動車 |
| tech. | ridge directional brace | 小屋筋違 (こやすじかい) |
| tech. | ridge directional brace | 桁行筋違 (けたゆきすじかい) |
| gen. | SDF simplified directional facility | 簡易方向指示施設 |
| el., sec.sys. | unblocking directional comparison protection | 非阻止方式オーバーリーチ保護 |
| gen. | uni-directional | 単一指向性 |
| gen. | uni-directional crystalization | 一方向結晶制御 |