noun
high hurdles
Refers to the track and field event or the physical hurdles themselves. Also used metaphorically for a high barrier or difficult challenge.
彼はハイハードルで全国大会に出場した。
He competed in the national tournament in the high hurdles.
このプロジェクトはハイハードルだが、挑戦する価値はある
This project is a high hurdle, but it's worth taking on.