Just A Reincarnation Story (Summoning Japan Edition)

As he closed his eyes, his life flashed before his eyes. Starting from birth, adolescence, adulthood, and then his death. He had witnessed his homeland decline from prosperity and died with regret for all the comrades he lost. Only to find himself awoken in the past as a young boy.
With his memories of his previous life, he decided to use his advance knowledge for the prosperity of his homeland. His ancestors may have set the grounds for the Holy Milishial Empire to shine high in the sky, but he will make sure that it will shine victoriously.
Forever.
DISCLAIMER: (Nihonkoku Shoukan/Summoning Japan belongs to Minorou.)