matter of concern; matter of interest
彼の最大の関心事は家族の健康だ。
His greatest concern is the health of his family.
その記者は常に時代の関心事を鋭くとらえていた。
That journalist always had a sharp eye for the issues that concerned the era.
政治への無関心が増えたことが社会の関心事になっている。
The rise of political apathy has become a matter of social concern.