noun, na-adjective
hard to get; difficult to obtain
Used for items that are scarce, out of stock, or otherwise not easily acquired. Often seen in product descriptions or news about limited releases.
この限定版は入手困難になっている。
This limited edition has become hard to get.
入手困難な部品を探している。
I'm looking for a part that is difficult to obtain.
Compound of 入手 (obtaining) and 困難 (difficulty).