Translation guide
This phrase is used to limit the scope of a statement to a particular topic or person. In Japanese, it is often expressed with topic markers, conditional forms, or set phrases rather than a single direct translation.
To specify what or who you are talking about, often to give an opinion or fact limited to that subject.
A common and neutral way to say 'as for N' or 'regarding N'. It explicitly marks the topic and is widely used in both spoken and written Japanese.
To express a personal opinion or stance, often contrasting with others' views.
Attaches to a person or entity to mean 'as N' or 'from N's standpoint'. It highlights the perspective of that person/entity.
Do not try to translate 'as far as ... is concerned' word-for-word into Japanese. There is no single equivalent phrase. Instead, use the patterns above depending on whether you are marking a topic or expressing a perspective.
Both mean 'regarding', but に関しては is more formal and often used in written or official contexts. については is neutral and suitable for everyday use.
As far as that matter is concerned, it hasn't been decided yet.
As far as he is concerned, I don't know him very well.
More formal than については. Often used in business or official contexts.
As far as safety is concerned, there is no problem.
The simple topic marker は can often convey 'as for N' when the context is clear. It is less emphatic but very natural in conversation.
As far as I'm concerned, it's fine.
Literally 'as long as it concerns N'. Used to emphasize that the statement is true within the limits of what is known about N. Somewhat formal and less common in daily speech.
As far as I know, he is innocent.
As far as I'm concerned, I'm against the plan.
As far as the company is concerned, we accept this decision.
Means 'if you try looking at it from N's side'. Emphasizes putting yourself in someone else's shoes.
As far as he is concerned, it's probably a natural reaction.
Literally 'if you let N say'. Used to introduce someone's opinion, often with a nuance of 'according to N'.
As far as he is concerned, that's a mistake.