Translation guide
The English word "mostly" is used to indicate that something is true in the majority of cases, but not always. In Japanese, this concept is expressed through various adverbs and phrases that convey "for the most part," "generally," or "almost all." The choice depends on whether you are describing a general tendency, a large proportion, or an approximation.
Describing a general tendency or habitual state that is true most of the time.
The most common and versatile word for "mostly" or "usually." It can be used in both spoken and written Japanese to describe habitual actions or general states.
I mostly eat breakfast.
He is mostly late.
Means "usually" or "ordinarily," emphasizing what is normal or routine. Often used for personal habits.
I mostly commute by train.
More formal and often used in written contexts or official descriptions. Means "normally" or "generally."
This store mostly opens at 9 o'clock.
Indicating that something is true in most respects or that the majority of something has a certain quality.
Means "mostly," "roughly," or "for the most part." Very common in conversation. Can also mean "approximately."
I'm mostly done with work.
Means "almost all" or "nearly." Stronger than 大体, implying a very high proportion. Be careful: when used with a negative, it means "hardly."
Means "mainly" or "primarily." Focuses on the main part or purpose.
Emphasizing that something is true to a very large extent, with few exceptions.
大抵 (たいてい) is used for habitual actions or general tendencies ("usually"), while 大体 (だいたい) is used for approximations or describing the extent of completion ("for the most part"). 大抵 implies a pattern over time; 大体 implies a rough estimate or partial completion.
I mostly go by bus. (habitual)
I'm mostly done with my homework. (extent)
There is no single Japanese word that covers all uses of "mostly." Translating it as 最も (most) or 大部分 (large part) can sound unnatural. Choose the appropriate adverb based on whether you mean "usually," "mainly," or "almost all."
I mostly read books on weekends.
The audience was mostly young people.
She mostly eats vegetables.
I mostly understand what he's saying.
参加者のほとんどが女性でした。
The participants were mostly women.
この地域では主に米が作られています。
Rice is mostly grown in this region.
問題の大半は解決しました。
Most of the problems have been solved.