noun
hot potato
Loanword from English; used literally for a baked or heated potato, and figuratively for a controversial or difficult issue, mirroring the English idiom.
寒い日にはホットポテトが食べたくなる。
On a cold day, I crave a hot potato.
その法案は政治的なホットポテトになった。
The bill became a political hot potato.