1. Tsutomu SakumaTsutomu Sakuma 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.
Read “Tsutomu Sakuma” on English Wikipedia
Read “佐久間勉” on Japanese Wikipedia
Read “Tsutomu Sakuma” on DBpedia
Read “Tsutomu Sakuma” on English Wikipedia
Read “佐久間勉” on Japanese Wikipedia
Read “Tsutomu Sakuma” on DBpedia
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