Konpeki no Kantai

is a Japanese alternate history series produced by J.C.Staff. The series focuses on both a technologically-advanced Imperial Japanese Navy and a radically-different World War II that were brought about by Admiral Isoroku Yamamoto's revival by unexplained circumstances. Both the published books and the original video animation (OVA) series are also notable for using the Imperial Japanese calendar, instead of the Western calendar, in denoting the years in which the events of the series take place. It also spawned a 1997 OVA side story, , one manga sequel, and two turn-based strategy games for the PC-FX and the Super Famicom. Konpeki no Kantai is based on a novel series written by Yoshio Aramaki, whose first volume was published in December 1990. The novel's popularity reportedly rose dramatically because of the start of the Gulf War the following month. Aramaki later wrote a different series, (literally "Fleet of the Rising Sun"), elements of which were used in the OVA sequel. Both series eventually sold more than five million copies. Between 1997 and 2000, Aramaki wrote two sequel series: Shin Konpeki no Kantai (新・紺碧の艦隊, 9 volumes) and Shin Kyokujitsu no Kantai (新・旭日の艦隊, 18 volumes). The title is a reference to the series depicting an advanced submarine force. Point of divergence In the first episode, Admiral Isoroku Yamamoto's death still proceeds on April 18, 1943, just as in reality. Just before his damaged plane crashes into Bougainville Island, Yamamoto blacks out before he awakens in a ship quarters as his younger self. Unaware of what has just happened, Yamamoto speaks with a crewman and discovers that he is on board the Japanese cruiser Nisshin. He is then informed that the date is May 28, 1905 and that the Battle of Tsushima has just ended. Yamamoto discovers that he has somehow been transported back in time or to a parallel world.