Translation guide
The English adverb 'largely' is used to indicate that something is mostly or mainly true, or to a great extent. In Japanese, there is no single direct equivalent; the best choice depends on whether you are describing degree, proportion, or scope.
To say that something is true for the most part, or that the main part of something is a certain way.
This is the most common and neutral way to say 'mainly' or 'primarily'. It focuses on the main part or purpose.
To emphasize that something is done or happens to a large degree.
Used as an adverb meaning 'greatly' or 'significantly'. Common in both spoken and written Japanese.
Do not try to translate 'largely' word-for-word. There is no single Japanese adverb that covers all uses. Choose the expression that matches the intended meaning: 'mainly' (主に) or 'greatly' (大きく).
この地域は主に農業で成り立っている。
This region is largely dependent on agriculture.
His success is largely due to hard work.
Literally 'for the most part', this emphasizes that the majority of something is a certain way. Slightly more formal than 主に.
The problem has been largely resolved.
Means 'mostly' or 'the greater part'. Often used in written or slightly formal contexts.
People were largely in favor of the plan.
Means 'generally' or 'on the whole'. More formal and often used in written analysis.
This summer was largely cool.
The situation has changed largely.
His opinion largely influenced my thinking.
Means 'greatly' or 'very much'. Slightly more emphatic and often used in formal or written contexts.
The discovery contributed largely to science.
Means 'considerably' or 'quite'. Used in casual and spoken Japanese to indicate a large degree.
His Japanese has improved largely.