| Subject | English | Japanese |
| gen. | n decreasing birthrate and aging population | 少子高齢化 |
| gen. | decreasing function | 減少関数 (げんしょう・かんすう) |
| gen. | n vs decreasing in number | 減数 (gensū) |
| gen. | n decreasing land prices | 地下げ |
| gen. | n vs decreasing rapidly | 激減 news1 nf21 |
| tech. | decreasing rate of drying | 減率乾燥速度 (げんりつかんそうそくど) |
| phys. | decreasing sequence | 減少数列 (げんしょう・すうれつ) |
| phys. | decreasing sequence | 減少列 (げんしょうれつ) |
| gen. | n decreasing the number of stitches | 減らし目 (knitting) |
| gen. | gradually decreasing coefficient | 逓減係数 |
| phys. | increasing and decreasing | 増減 (ぞうげん) |
| phys. | monotone decreasing | 単調減少 (tanchō-genshō) |
| phys. | monotone decreasing function | 単調減少関数 (たんちょう・げんしょう・かんすう) |