The Battle of Nagashino took place on June 28, 1575 near Nagashino Castle on Shitarabara Plain in Mikawa Prefecture, Japan. Many historians cite it as the first modern Japanese battle. I will simulate a hypothesis in which Takeda makes better use of the terrain and available means, without sacrifices – in the style of the simulated medieval European battles in my books "Battle of Créçy, 1346" and "Battle of Agincourt, 1415" (in my series "Historical Simulation of Wars in the Medieval Era"). And, for this, he will defend himself in the style of the Roman Julius Caesar, theme of my book "Campaign and Battle of Alesia, 52 BC" (in my "Historical Simulation of the Roman Wars" series), internally against the castle s 500-strong garrison and externally against the Oda-Tokugawa army of 38,000.