noun
Refers to the act of starting up a business, project, computer system, or software. Often used in business and IT contexts.
新会社の立ち上げに携わった。
I was involved in the launch of the new company.
パソコンの立ち上げに時間がかかる。
It takes time to boot up the computer.
Nominalized form of the compound verb 立ち上げる (to start up, to launch), from 立つ (to stand) + 上げる (to raise).