Transmigrated into The Body of a Chinese Prince even though I'm Japanese

"Your heighness is wise, thanks to your advice... the Imperial Medical Academy has cured the plauge ravaging the land." - Doctor "I did what now?" - Prince "Your heighness is strong, the demonstration of your martial arts has convined the enemy nation to retreat" - General "My butt was just itchy, how does scratching it without using my hands count as martial arts?" - Prince "Your heighness is kind, the foreign princess with godly beauty was moved by you saving her life and hopes to be your empress" - Eunuch "What princess? All I did was give some fried chicken to some homeless vagrant woman" - Prince