が気がかり

be worried about

→ が
phrase Rare #26,461
be worried about Used after a noun or noun phrase to say that something is a concern or source of worry. 気がかり can also be written 気掛かり.
JA: 家族の健康が気がかりです。
EN: I’m worried about my family’s health.

私は将来のことが気がかり

I'm worried about the future.

の安否が気がかり

I'm worried about whether he's safe.

日本未来よりお前の将来の方が気がかり

I'm more worried about your future than Japan's.

それにしても種子島が気がかりだな

Even so, I'm worried about Tanegashima.

— 七人の侍 (1954)

彼の健康が気がかりです

I'm concerned about his health.