Translation guide
A person or thing that is essential to the success or functioning of an organization, plan, or system.
Referring to someone or something that holds everything together and without which everything would fail.
Literally 'pivot' or 'rivet', used metaphorically for the central, indispensable element. Very common and natural.
He is the linchpin of the team.
Loanword from English 'key person'. Used specifically for a person who is crucial, often in business or project contexts.
An indispensable presence. Emphasizes that the person or thing cannot be done without.
She is the linchpin of the team.
The English word 'linchpin' originally refers to a pin used to keep a wheel on an axle. This literal meaning is rarely used in modern English and has no direct, commonly used Japanese equivalent. In Japanese, always use a metaphorical term like 要 (かなめ) or キーパーソン for the figurative sense.
The linchpin of this plan is fundraising.
She is the linchpin of the project.
Central figure or key person. Slightly more formal, often used in organizational contexts.
He is the linchpin of the company.
Literally 'central pillar', originally referring to the main pillar of a traditional house. Metaphorically, the mainstay or breadwinner of a family or organization. Has a slightly traditional or familial nuance.
My father is the linchpin of our family.