the answer is Mexico
The southwest region of the United States borders Mexico.
The region that borders the Southwest region on the east is the South region of the United States. This area includes states such as Texas, Louisiana, Arkansas, and Oklahoma, which share borders with the Southwest states like Arizona and New Mexico. The geographical and cultural characteristics of the South influence the dynamics of the Southwest region.
If you are referring to the southern region of the United States, then Mexico borders the southwestern US.
The Himalayas border the southwest region of China. This mountain range is home to some of the world's highest peaks, including Mount Everest.
Inhabitants of southwest Arabia are commonly referred to as Yemenis, due to the majority of the region falling within the borders of Yemen.
Southwest Africa is a region of the country of Africa. This region i known for it's unique musical style and friendly society.
Southwest
If you are referring to the United States, that would be the southwest.
In the Southwest region of the United States, Texas is the only state that does not border the West region. While it shares borders with New Mexico to the west and Oklahoma to the north, Texas is primarily considered part of both the Southwest and the South. Other states in the Southwest, such as Arizona and New Mexico, are directly adjacent to the Western states.
The region area or country borders china on the east is East China Sea and South China Sea.
Spain