advexontube.com Seosan TV DOCUMENTARY HD ( WORLD BEST DOCUMENTARIES AROUND THE WORLD ) The I-400-class submarine or Imperial .\r<br>\r<br>\r<br>\r<br>Imperial Japanese Navy submarines were the largest submarines of World War II and remained the largest ever built until the construction of nuclear ballistic .\r<br>\r<br>A World War Two Japanese submarine, that had been lost since 1946, is discovered off the coast of a Hawaiian island. A World War II Imperial Japanese Navy .
