Step 1: Recall the host for the 2026 Winter Games.
The 25th Winter Olympic Games of 2026 were awarded to Milan and Cortina d'Ampezzo.
Step 2: Identify the country.
Both these host cities lie in Italy, making it the host nation.
Step 3: Eliminate the rest.
Japan hosted the Winter Games earlier (2022 Beijing was China, not Japan), the United States has hosted before but not this edition, and England has never hosted a Winter Olympics.
\[ \boxed{\text{Italy}} \]