Naming the Focal Point
を中心に marks what something revolves around — a topic, a region, a person, an age group.
- 若者を中心に人気が広がっている。(It's growing popular, mainly among young people.)
It does not mean "only". The centre is where the thing is concentrated, and the edges still exist.
Three Forms
| Form | Use |
|---|---|
| を中心に | before a verb |
| を中心として | before a verb, slightly more formal |
| を中心とした | before a noun |
The last is the one people forget: 東京を中心とした地域.
Against だけ and 主に
| Pattern | Sense |
|---|---|
| だけ | only — nothing outside |
| 主に | mainly — a plain adverb |
| を中心に | concentrated around a centre, spreading outward |
を中心に carries the image of a centre with a periphery, which 主に does not.
Register
Formal and written — reports, news, descriptions of trends and regions.
