は見たことがない

have never seen

→ は
phrase Rare #27,741
have never seen Used to say that someone has never had the experience of seeing something. The は marks the thing being discussed.
JA: こんなに美しい景色は見たことがない。
EN: I've never seen such a beautiful view.

そんな美しい花は見たことがない

I've never seen such a beautiful flower.

こんな大きなスイカは見たことがない

I've never seen a watermelon this big.

こんなにきれいな花は見たことがない

I've never seen such beautiful flowers.

これほど美しい景色は見たことがない

I've never seen scenery this beautiful.

私はこの種のは見たことがない

I've never seen this kind of bird before.

呪術は見たことがない

I've never watched Jujutsu Kaisen.

— 罪人たち (2025)

こんなに大きな真珠は見たことがない

I've never seen such a large pearl.