Japanese minelayer Yaeyama

Yaeyama (八重山) was a small minelayer of the Imperial Japanese Navy, which was in service during the Second Sino-Japanese War and World War II. She was named after the Yaeyama Islands in the Ryukyu Islands chain. She was the first Japanese warship built with an all-welded hull.

Building
The Imperial Japanese Navy budget for Fiscal 1927 include a small minelayer for coastal and river service to complement its larger minelayers, the former cruisers JAPANESE CRUISER Aso, and JAPANESE CRUISER Tokiwa. Yaeyama was launched by the Kure Naval Arsenal in Hiroshima Prefecture, Japan on October 15, 1931, and was commissioned into service on August 31, 1932.

Operational history
On completion, Yaeyama was assigned to the Sasebo Naval District. In August 1937, following the Marco Polo Bridge Incident and the start of the Second Sino-Japanese War, Yaeyama was assigned as flagship for Admiral Umataro Tanimoto’s 11th Gunboat Division, at Shanghai and was responsible for patrols on the Yangzi River. Yaeyama covered the landing of Japanese Special Naval Landing Forces (SNLF) reinforcements in the Battle of Shanghai, and participated in the evacuation of 20,000 Japanese civilians and non-combatants from the city back to Japan. She was then placed on the reserve list on December 1, 1937.

Yaeyama was reactivated on May 25, 1938 and assisted in covering the landings of more Japanese troops in Tianjin and along the Yangzi River in July. She was then assigned to Amoy from September 26, 1939 until her transfer to Palau on December 1, 1941.

At the time of the attack on Pearl Harbor in December 1941, Yaeyama was assigned to “Operation M” (the invasion of the southern Philippines) deploying from Palau to mine the Surigao Strait. On January 3, 1942, she became flagship for Admiral Rokuzo Sugiyama’s Third Southern Expeditionary Fleet and covered landings at Subic Bay, and was based at Manila from July 1942 under the overall command of the Southwest Area Fleet.

Yaeyama was refit as an anti-submarine convoy escort ship in December 1943, with all minelaying rails removed and replaced by 36 depth charges, and was reassigned to the First Southern Expeditionary Fleet. She escorted a convoy of transports from Manila to Singapore in January 1944, and a convoy from Manila to Halmahera Island in May 1944.

On the early morning of September 24, 1944 Yaeyama was sunk by air attack by 96 Grumman F6F Hellcat and 24 Curtiss SB2C Helldiver aircraft from the carriers USS Intrepid (CV-11) and USS Lexington (CV-16) and the light carrier USS Cabot (CVL-28) while anchored in Coron Bay, Busuanga Island, off Palawan Island in the Philippines. 12.25°N, 121°W. Most of the crew survived, including her commanding officer, Captain Michizo Tsutsumi.

Yaeyama was removed from the navy list on November 10, 1944.