Ministry of the Navy of Japan

The Navy Ministry of Japan (海軍省) was a cabinet-level ministry in the Empire of Japan charged with the administrative affairs of the Imperial Japanese Navy (IJN). It existed from 1872 to 1945.

History
The Navy Ministry was created in April 1872, along with the Army Ministry, to replace the Ministry of the Military (兵部省) of the early Meiji government.

Initially, the Navy Ministry was in charge of both administration and operational command of the Imperial Japanese Navy. However, with the creation of the Imperial Japanese Navy General Staff in May 1893, it was left with only administrative functions.

"The ministry was responsible for the naval budget, ship construction, weapons procurement, personnel, relations with the Diet and the cabinet and broad matters of naval policy. The General Staff directed the operations of the fleet and the preparation of war plans". The post of Navy Minister was politically powerful. Although a member of the Cabinet after the establishment of the cabinet system of government in 1885, the Navy Minister was answerable directly to the Emperor (the commander-in-chief of all Japanese armed forces under the Meiji Constitution) and not the Prime Minister.

Up until the 1920s, the Navy Ministry held the upper hand over the Navy General Staff in terms of political influence. However, the officers of the Navy General Staff found an opportunity at the Washington Naval Conference in 1921–22 to improve their situation. At this meeting, the United States and Britain wanted to establish a worldwide naval ratio, asking the Japanese to limit themselves to a smaller navy than the Western powers. The Naval Ministry was willing to agree to this, seeking to maintain the Anglo-Japanese Alliance, but the Navy General Staff refused. The Imperial Japanese Navy became divided into mutually hostile Fleet Faction and Treaty Faction political cliques. Ultimately, the treaty was signed by Japan, but terminated in 1934. Through the 1930s, with increasing Japanese militarism, the Fleet Faction gradually gained ascendancy over the Treaty Faction and came to dominate the Navy General Staff, which pushed through the attack on Pearl Harbor against the resistance of the Navy Ministry.

After 1937, both the Navy Minister and the Chief of the Navy General Staff were members of the Imperial General Headquarters.

With the defeat of the Empire of Japan in World War II, the Navy Ministry was abolished together with the Imperial Japanese Navy by the American occupation authorities in November 1945 and was not revived in the post-war Constitution of Japan.

Internally Operating Divisions

 * Military Affairs Bureau
 * Mobilization Bureau
 * Technical Bureau
 * Personnel Bureau
 * Training Bureau
 * Medical Bureau
 * Shipyard Bureau
 * Naval Construction Bureau
 * Legal Bureau
 * Administrative/Accounting Bureau

Externally Operating Divisions

 * Navy Aviation Bureau
 * Navy Academy
 * Naval War College (Japan)
 * Naval Accounting School
 * Navy Medical School
 * Naval Engineering School
 * Submarine Division
 * Canals and Waterways Division
 * Naval Technical Department
 * Naval Tribunal
 * Tokyo Naval Tribunal
 * Chemical Warfare Division
 * Radio and Radar Division
 * Supply and Transport Bureau
 * Naval Construction Division
 * Naval Maintenance & Repair Division
 * Special Attack Weapons Division
 * Emergency Reaction Division
 * Naval Aviation Training Division
 * Naval Intelligence Division

Ministers of the Navy of Japan
By law, Navy Ministers had to be appointed from active duty admirals or vice-admirals.

Naval Lords under the Ministry of Military Affairs

 * Katsu Kaishū
 * Kawamura Sumiyoshi
 * Enomoto Takeaki (28 February 1880 – 7 April 1881)
 * Nakamuta Kuranosuke
 * Kabayama Sukenori