Indicates that something is the center or focal point of an activity, movement, or arrangement — 'centering on', 'mainly', or 'with ... at the core'. It can refer to a physical center, a central figure, or the main focus of an effort. The form を中心とする/を中心とした is used to modify a noun.
[Noun] + を中心に(して) / [Noun] + を中心とする・とした + [Noun]
この町は駅を中心に発展してきた。
Kono machi wa eki o chuushin ni hatten shite kita.
This town has developed centering on the station.
駅 (station) + を中心に marks the focal point of the town's growth.
彼女を中心にしてチームがまとまった。
Kanojo o chuushin ni shite chiimu ga matomatta.
The team came together with her at its center.
彼女 (she) + を中心にして shows she is the central figure.
若者を中心とした運動が広がっている。
Wakamono o chuushin to shita undou ga hirogatte iru.
A movement centered on young people is spreading.
を中心とした modifies 運動 to describe its core participants.
• を中心に(して) works adverbially; を中心とする/とした modifies a following noun. • Can describe a spatial center, a key person, or a main theme. • Register: neutral to formal, common in news and reports.
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones を中心に(して) is tested against.
をめぐって frames a topic of dispute/discussion, while を中心に marks something as the focal core of an activity.
をもとに means 'based on (a source/material)', whereas を中心に means an activity revolves around a central point.
Study Japanese grammar on LenGaki

Get the Android app
The app adds offline study, home-screen widgets, stroke-order tracing, speaking practice with pronunciation scoring, and an AI tutor that answers questions in context — none of which fits in a browser tab.