Demand
Request
noun, verbal noun
You need something so you request it. But, since it's such a strong need, it's not really a request, it's more of a demand.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
プロジェクトの人手が足りないので応援を要請しました。
Because we have a lack of hands in our project, we have requested some help.
残念ながら、田村マネージャーの追加人員要請は受理されなかったようです。
Unfortunately, Manager Tamura's request for additional workers was seemingly not accepted.
労働組合は賃上げを要請した。
The labor unions demanded a wage increase.