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投入する
tōnyū suru
invest
会社は新しいプロジェクトに多額の資金を投入した。
The company invested a large amount of money in the new project.
formal
to invest (money, resources, effort, etc.) into something for a specific purpose
政府は再生可能エネルギーに多額の予算を投入した。
The government invested a large budget in renewable energy.
彼女は研究に全力を投入した。
She devoted all her energy to the research.
Commonly used in business, finance, and project contexts. Can also imply 'to throw/insert' in a literal sense (e.g., 投入する into a machine).
formal
to throw into; to insert (literally)
コインを自動販売機に投入する。
Insert the coin into the vending machine.
Less common in modern usage compared to the figurative meaning. Often used with machines or containers.
Related Phrases
Pro Tip
Distinguish from '投資する' (to invest)
'投入する' emphasizes the act of putting resources into a project or system, while '投資する' focuses on the long-term financial return. For example, '研究に資金を投入する' (invest funds into research) is more common than '研究に投資する' in formal contexts.
Gold Rule
Use '投入する' for active allocation
Always pair '投入する' with a specific resource (e.g., 資金, 努力, 人材) and a clear purpose. Avoid vague usages like '時間を投入する' unless the context is highly formal.
Word Origin
From the verb '投げる' (to throw) + '入れる' (to insert), forming a compound verb meaning 'to throw into' or 'to invest'. The figurative meaning of 'invest' emerged in the Meiji era (late 19th century) as Japan modernized its economy.
Usage Notes
In business contexts, '投入する' often implies a strategic allocation of resources with the expectation of returns. Avoid using it for passive or wasteful spending (e.g., 不要な広告費を投入する is acceptable but implies poor judgment).
Word Breakdown
投
to throw
root入
to enter
rootする
to do (verb suffix)
suffix和英辞典