Tokyo: Bubble, but the system is Sengoku

Summary Good news, he survived the car accident, transmigrated to bubblegum Tokyo, has a system, and is an actor.The bad news is that his identity is that of a lowly Karami, and the system he awakened is outdated.However, the Warring States system, which I initially thought was useless, is not quite right!......[For our lord! Though you have lost, you are still glorious! Unlock achievement: The Heroic Spirit Lives On][Bonus Skill: Last Stand]This is for shooting cannon fodder.[Unrivaled in bravery, taking on a hundred enemies single-handedly! Unlock achievement: Contemporary Sword Saint][Reward: Supreme Swordsmanship!]This is a film about Samurai Battle Royale.[A harmonious and blissful harem! Unlock achievement: The Reincarnation of a Casanova]???This was just him chatting with some actresses he'd worked with and his idols at an awards ceremony!......Fans all know that Ryo Sato can play any role convincingly, and his acting is so realistic.Many years later, they learned that Ryo Sato was not acting.[Japanese entertainment + system + multiple female leads]...