Named Isoroku Yamamoto in his former life, he keeps his name and becomes the commander-in-chief of the Imperial Japanese Navy. He uses the knowledge he gained in his past life to guide Japan in a more favourable path during the second World War.

Konpeki no Kantai is a Japanese alternate-history original video animation series produced by JC Staff. Based on a 1992 novel by Yoshio Aramaki, the series focuses on a technologically advanced Imperial Japanese Navy and a radically different Pacific War that was brought about by Admiral Isoroku Yamamoto's revival in the past due to unexplained circumstances. The series also features real-life 1940s figures whose first names were changed, such as Winston Churchill to Kingston Churchill and Adolf Hitler to Heinrich von Hitler.<br><br>
(Source: Wikipedia)

[Wiki (jp)](https://ja.wikipedia.org/wiki/屋良有作)

Isoroku Takano