Self-Defense Forces Commemoration Day (Japan)

An Armed Forces Day, alongside its branch-specific variants often referred to as Army or Soldier's Day, Navy or Sailor's Day, and Air Force or Aviator's Day, is a holiday dedicated to honoring the armed forces, or one of their branches, of a sovereign state, including their personnel, history, achievements, and sacrifices. It's often patriotic or nationalistic in nature, carrying information value outside of the conventional boundaries of a military's subculture and into the wider civilian society. Many nations around the world observe this day. It is usually distinct from a Veterans or Memorial Day, as the former is dedicated to those who previously served and the latter is dedicated to those who perished in the fulfillment of their duties.

Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asian mainland, it is bordered to the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea in the south. The Japanese archipelago consists of four major islands alongside 14,121 smaller islands, covering 377,975 square kilometers (145,937 sq mi). Divided into 47 administrative prefectures and eight traditional regions, about 75% of the country's terrain is mountainous and heavily forested, concentrating its agriculture and highly urbanized population along its eastern coastal plains. With a population of over 123 million as of 2025, it is the 11th most populous country. The country's capital and largest city is Tokyo.