Translation guide
The English word 'initial' can describe something that comes first, the first letter of a name, or the act of signing with initials. This guide covers natural Japanese equivalents for each use.
Describing something that happens at the beginning or is the first of its kind.
The most common and versatile way to say 'initial' as in 'first'. Used for time, order, or sequence.
最初の印象はとても大切です。
The initial impression is very important.
The initial plan failed.
Often used for 'initial stage', 'early period', or technical contexts like software versions.
初期の症状は風邪に似ています。
The initial symptoms resemble a cold.
このソフトの初期バージョンにはバグが多い。
The initial version of this software has many bugs.
Similar to 最初の but slightly more casual and often used for the very beginning of an action or event.
初めの一歩が一番難しい。
The initial step is the hardest.
Referring to the first character of a person's name, often used in signatures or monograms.
The direct loanword from English, widely understood. Can refer to one letter or multiple initials.
彼のイニシャルはT.K.です。
His initials are T.K.
このバッグにイニシャルを入れてください。
Please put my initials on this bag.
Literally 'head character'. More formal or literary than イニシャル. Often used for acronyms or the first letter of a word.
The act of writing one's initials, often to approve or acknowledge a document.
The most straightforward way to say 'to initial' a document. Use サインする for a full signature.
ここにイニシャルを書いてください。
Please initial here.
More formal, explicitly stating 'sign with initials'. Used in official contexts.
各ページにイニシャルで署名してください。
Please initial each page.
最初の is the default for 'first' in a sequence. 初期の is more specialized, meaning 'early period' or 'initial phase', and is common in technical, medical, or historical contexts.
最初のページ
the first page
初期のコンピューター
early computers
名前の頭文字をとってチーム名にした。
We took the initials of our names and made it the team name.