Reincarnated as a Sickly Lord, I’ll Revolutionize the Sengoku Era

"I died designing air conditioners. I was reborn as a warlord's sickly son. Now I'll build an empire."Takeshi Yamamoto spent twenty-eight years as a nobody—brilliant, educated, and utterly wasted in modern Tokyo. When an earthquake kills him, a mysterious god grants his desperate wish: rebirth in the Sengoku period he'd studied obsessively.Now he's Matsudaira Kazuki, third son of a bankrupt daimyo in 1543 Japan. Weak body. Empty treasury. Brother who wants him dead. Domain on the brink of collapse.But Kazuki has something no one in this era possesses: four centuries of future knowledge. Modern metallurgy. Industrial organization. Military innovations that won't be invented for 200 years.The Portuguese haven't brought firearms yet. Oda Nobunaga is still a child.And Matsudaira Kazuki has an industrial revolution to start.One man. Modern knowledge. Feudal Japan.Time to rewrite history.