OVA
Description
Based on Admiral Isoroku Yamamoto's consciousness transported from 1943 back to his younger self aboard the cruiser *Nisshin* after the 1905 Battle of Tsushima, Isoroku Takano retains memories of Japan's World War II defeat. Reverting to his birth name, he commits to altering Japan's path using future knowledge.
His early naval career initially parallels history, including graduation from the Imperial Japanese Naval Academy and service in the Russo-Japanese War. A critical divergence occurs at Tsushima: instead of losing fingers, he sustains chest injuries, preserving his physical capabilities and marking the first tangible timeline shift.
Advancing through naval ranks, Takano becomes Vice Minister of the Navy by 1939. He opposes the Tripartite Pact with Germany and Italy and resists Imperial Japanese Army expansionism in China, recognizing it as a precursor to catastrophic war. Frustrated by the militarist government's path toward conflict, he orchestrates a coup against Prime Minister Hideki Tōjō in late 1941, days before Pearl Harbor. Collaborating with Lieutenant General Yasaburō Otaka—another individual possessing future knowledge—he installs Otaka as Prime Minister to enact strategic reforms.
As War Minister, Takano spearheads Japan's military transformation:
- **Technological Overhaul**: He accelerates development of nuclear submarines (evolving from the I-400 Sen-Toku design), supercarriers, jet aircraft, and long-range Fuji flying boat bombers. This "Deep Blue Fleet" program enables unprecedented capabilities like nighttime carrier operations and submarine-launched airstrikes.
- **Tactical Innovations**: He ensures Japan declares war before attacking Pearl Harbor, eliminates historically spared infrastructure like fuel depots and shipyards, and invades Hawaii by exploiting U.S. defense gaps. Subsequent operations destroy the Panama Canal locks (1942–1943) and bomb the Manhattan Project's Los Alamos facility (1943) to cripple U.S. recovery.
- **Global Strategy**: After securing Pacific dominance, anticipating Nazi Germany's betrayal, he deploys Fuji "aerial battleships" for a trans-polar strike on Germany's Nuremberg nuclear facility (1944). He establishes the Oriental Republic of Jerusalem with Albert Einstein to rescue Jewish refugees. His forces later engage Germany in India, Mongolia, and the Atlantic, culminating in joint Allied operations halting the European invasion.
Post-Pacific War, depicted in the sequel *Kyokujitsu no Kantai*, Takano expands Japan's naval reach into the Atlantic. His forces destroy Germany's super-battleship *Bismarck II* and assault coastal installations in France, facilitating Allied counteroffensives. He coordinates commando raids on Hitler's command center and supports U.S.-British efforts during Operation Sea Lion, contributing to Germany's defeat by 1950.
Throughout his leadership, Takano balances ruthless pragmatism with introspection, burdened by memories of Japan's original downfall. His alliance with Einstein and humanitarian efforts for refugees contrast with aggressive military campaigns, reflecting a complex duality driven by his determination to "correct" history.
His early naval career initially parallels history, including graduation from the Imperial Japanese Naval Academy and service in the Russo-Japanese War. A critical divergence occurs at Tsushima: instead of losing fingers, he sustains chest injuries, preserving his physical capabilities and marking the first tangible timeline shift.
Advancing through naval ranks, Takano becomes Vice Minister of the Navy by 1939. He opposes the Tripartite Pact with Germany and Italy and resists Imperial Japanese Army expansionism in China, recognizing it as a precursor to catastrophic war. Frustrated by the militarist government's path toward conflict, he orchestrates a coup against Prime Minister Hideki Tōjō in late 1941, days before Pearl Harbor. Collaborating with Lieutenant General Yasaburō Otaka—another individual possessing future knowledge—he installs Otaka as Prime Minister to enact strategic reforms.
As War Minister, Takano spearheads Japan's military transformation:
- **Technological Overhaul**: He accelerates development of nuclear submarines (evolving from the I-400 Sen-Toku design), supercarriers, jet aircraft, and long-range Fuji flying boat bombers. This "Deep Blue Fleet" program enables unprecedented capabilities like nighttime carrier operations and submarine-launched airstrikes.
- **Tactical Innovations**: He ensures Japan declares war before attacking Pearl Harbor, eliminates historically spared infrastructure like fuel depots and shipyards, and invades Hawaii by exploiting U.S. defense gaps. Subsequent operations destroy the Panama Canal locks (1942–1943) and bomb the Manhattan Project's Los Alamos facility (1943) to cripple U.S. recovery.
- **Global Strategy**: After securing Pacific dominance, anticipating Nazi Germany's betrayal, he deploys Fuji "aerial battleships" for a trans-polar strike on Germany's Nuremberg nuclear facility (1944). He establishes the Oriental Republic of Jerusalem with Albert Einstein to rescue Jewish refugees. His forces later engage Germany in India, Mongolia, and the Atlantic, culminating in joint Allied operations halting the European invasion.
Post-Pacific War, depicted in the sequel *Kyokujitsu no Kantai*, Takano expands Japan's naval reach into the Atlantic. His forces destroy Germany's super-battleship *Bismarck II* and assault coastal installations in France, facilitating Allied counteroffensives. He coordinates commando raids on Hitler's command center and supports U.S.-British efforts during Operation Sea Lion, contributing to Germany's defeat by 1950.
Throughout his leadership, Takano balances ruthless pragmatism with introspection, burdened by memories of Japan's original downfall. His alliance with Einstein and humanitarian efforts for refugees contrast with aggressive military campaigns, reflecting a complex duality driven by his determination to "correct" history.