Translation guide
The English word "initiator" refers to someone or something that starts a process, action, or event. In Japanese, there is no single direct equivalent; the best translation depends on context. This guide covers common ways to express the idea of an initiator in various situations.
To refer to a person who takes the initiative to begin an action, project, or event.
Refers to a person who proposes and starts a project, movement, or event. Often used for founders of organizations or campaigns.
彼がこのプロジェクトの発起人です。
He is the initiator of this project.
Literally 'person who sets things up', used for someone who instigates or engineers a plan, often with a nuance of behind-the-scenes maneuvering.
彼女がこの改革の仕掛け人だ。
She is the initiator of this reform.
A straightforward phrase meaning 'the person who started it first'. Natural in casual conversation.
誰が最初に始めた人なの？
Who was the initiator?
Pioneer or forerunner; someone who initiates a new field or trend. More about being first in a domain than starting a specific event.
彼はこの分野の先駆者として知られている。
He is known as an initiator in this field.
To describe someone who takes the first step in communication, such as starting a conversation or making an approach.
Literally 'person who cuts out the talk', meaning someone who broaches a topic or starts a conversation.
彼はいつも話を切り出す人だ。
He is always the initiator of conversations.
Means 'the person who calls out first', used for someone who initiates contact or starts talking.
パーティーでは、彼女が最初に声をかける人だった。
At the party, she was the initiator of conversation.
To refer to an inanimate cause or catalyst that sets off a chain of events, such as in science or technology.
Technical term for a chemical initiator or catalyst that starts a reaction. Used in chemistry and materials science.
この反応には開始剤が必要です。
This reaction requires an initiator.
Literally 'trigger', used metaphorically for something that initiates an event or process.
その事件が戦争の引き金となった。
That incident was the initiator of the war.
Detonator or priming agent; used figuratively for something that sparks a sudden change or action.
To refer to a device or program that initiates a command or data transfer, such as in SCSI or networking.
Loanword from English, used in IT contexts for a device or process that initiates a SCSI command or similar operation.
SCSIイニシエータがターゲットにコマンドを送信する。
The SCSI initiator sends a command to the target.
Means 'initiating side' or 'originating end', used in technical descriptions of protocols or processes.
通信の開始側が最初のパケットを送る。
The initiator of the communication sends the first packet.
There is no single Japanese word that covers all uses of 'initiator'. Using イニシエーター outside of technical contexts will sound unnatural. Choose the option that best fits the specific situation.
発起人 is a neutral term for someone who proposes and starts something, often with a positive connotation. 仕掛け人 implies a more strategic or behind-the-scenes role, sometimes with a nuance of manipulation.
彼のスピーチが運動の起爆剤になった。
His speech became the initiator of the movement.