Japanese Imperialism refers to the period in the late 19th and early 20th centuries when Japan expanded its territory and influence across Asia. Driven by a desire for resources and power, Japan sought to compete with Western nations. This expansion included the annexation of territories like Korea and parts of China, as well as the establishment of a presence in Southeast Asia. During this time, Japan adopted Western technologies and military strategies, which helped it become a formidable power. The victory in the Russo-Japanese War (1904-1905) marked Japan's emergence as a major imperial force, altering the balance of power in the region and leading to significant political and social changes in the countries it dominated.