The naval history of Japan began with early interactions with states on the Asian continent in the 3rd century BCE during the Yayoi period. It reached a pre-modern peak of activity during the 16th century, a time of cultural exchange with European powers and extensive trade with the Asian continent. After over two centuries of self-imposed seclusion under the Tokugawa shogunate, Japan's naval technologies became outdated compared to Western navies. The country was forced to abandon its maritime restrictions by American intervention with the Perry Expedition in 1854. This and other events led to the Meiji Restoration, a period of frantic modernization and industrialization accompanied by the re-ascendance of the Emperor's rule and colonialism with the Empire of Japan. Japan became the first industrialized Asian country in 1868, by 1920 the Imperial Japanese Navy was the third largest navy in the world and arguably the most modern at the brink of World War II. The Imperial Japanese Navy had a history of successes, sometimes against much more powerful foes as in the 1894–1895 Sino-Japanese War, the 1904–1905 Russo-Japanese War, and early naval battles during World War II. In 1945, towards the end of the conflict, the navy was almost completely destroyed by the United States Navy. Japan's current navy is a branch of the Japan Self-Defense Forces (JSDF) called the Japan Maritime Self-Defense Force (JMSDF). In 2015, the JMSDF was ranked by Credit Suisse as the fourth most powerful military in the world. However, it is still denied any offensive role by the nation's post-war Constitution and public opinion. Prehistory Japan was connected to the Asian continent via land bridges during the glacial maximum of the last ice age around 20,000 BCE. This allowed for the transmission of flora and fauna, including the establishment of the Jōmon culture. The land bridges disappeared in the Jōmon period around 10,000 BCE. After that period however, Japan became an isolated island territory, depending entirely on sporadic naval activity for its interactions with the continent. The shortest seapath to the continent (besides the inhospitable northern path from Hokkaidō to Sakhalin) then involved two stretches of open water about 50 kilometers wide, between the Korean peninsula and the island of Tsushima, and then from Tsushima to the major island of Kyūshū. Various influences have also been suggested from the direction of the Pacific Ocean, as various cultural and even genetic traits seem to point to