Concern
Interest
noun
The things related to your heart are the things that concern and interest you the most.
かんしん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
日本のアニメの声ゆうは好きですが、海外のアニメの声ゆうには関心がありません。
I like Japanese anime voice actors but I have no interest in foreign ones.
げんざいの最大の関心は何ですか？
What is your greatest concern at the moment?
当社トーフグ、ならびに当社製品に関心をお寄せいただき、有難うございます。
Thank you for your interest in our company, Tofugu, and our products.