| Word | Reading | Meaning |
|---|
| 重要 | じゅうよう | important, momentous, essential, principal, major |
| 必要 | ひつよう | necessary, needed, essential, indispensable; necessity, need, requirement |
| 要求 | ようきゅう | demand, firm request, requisition, requirement, desire |
| 主要 | しゅよう | chief, main, principal, major |
| 需要 | じゅよう | demand, request |
| 要請 | ようせい | claim, demand, request, application |
| 必要性 | ひつようせい | necessity |
| 要因 | よういん | main cause, primary factor |
| 要員 | よういん | essential member, necessary person, personnel |
| 要素 | ようそ | component, factor, item (e.g. in list); element (e.g. in array), member (e.g. data structure) |
