"Empire of Japan" . "The destroyerHarukaze (\u6625\u98A8)" . . . . . "Staff Officer 1st Fleet" . "1910-04-15Z"^^ . . "No.4 submarine" . "Sakuma, Tsutomu"@en . "No.6 submarine" . "Japanese navy officer" . "1901Z"^^ . "1910Z"^^ . . . "1879-09-13Z"^^ . "Tsutomu Sakuma (\u4F50\u4E45\u9593 \u52C9, Sakuma Tsutomu, September 13, 1879 \u2013 April 15, 1910) was a career naval officer in the Imperial Japanese Navy, and a pioneer submarine commander, known primarily as the commanding officer during the sinking of Submarine No.6."@en . "Tsutomu Sakuma"@en . "1910Z"^^ . "1879Z"^^ .