| Subject | English | Japanese |
| gen. | approximate straight line mechanism | 擬似直線機構 |
| gen. | depreciation straight line method | 定額償却法 (ていがくしょうきゃくほう) |
| gen. | n distance in a straight line | 直線距離 (ちょくせん・きょり) |
| gen. | n yoji extension of a straight line | 延長線上 |
| gen. | n adj-no straight line | 直線 ichi1 news1 nf12 (chokusen) |
| gen. | n straight line | 棒線 |
| gen. | n straight line | 一文字 news2 nf37 (いちもんじ) |
| math. | straight line | 線 (sen) |
| construct. | straight line | 直線 (chokusen) |
| gen. | n straight line | 一直線 news1 nf21 |
| phys. | straight line at infinity | 無限遠直線 (むげん'えん・ちょくせん) |
| comp., MS | straight line depreciation | 定額法 (A method of depreciation that calculates the depreciation of a fixed asset as a fixed amount in each depreciation period, ていがくほう) |
| gen. | straight line method | 定額法 (ていがくほう) |
| gen. | straight line motion mechanism | 回転・直線変換機構 |
| gen. | straight line sharp cut-water | 直線形水切り |
| gen. | adj-na straight-line | 直線的 |
| gen. | n straight-line interpolation | 直線補間 |
| gen. | straight-line motion mechanism | 直線運動機構 |
| math. | straight-line segment | 直線分 |
| comp., MS | straight-line service life depreciation method | 耐用年数定額減価償却方法 (A method of depreciation that calculates the depreciation of a fixed asset as a fixed amount in each depreciation period) |
| comp., MS | straight-line service life remaining depreciation method | 耐用年数残減価償却方法 (A method of depreciation that calculates the depreciation of a fixed asset as a fixed amount in each depreciation period. There will be a difference in the depreciation amount calculated between straight-line service life remaining and straight-line service life when there is an adjustment posted to the asset) |