The Movie Timeline - be obsessive, be very obsessive
13 Assassins - timeline
4th March: Akashi Clan House Elder Zusho Mamiya commits ritual harakiri as a public protest against the Shogun's decision to elevate his evil, sadistic half-brother, Lord Naritsugu Matsudaira, to a seat on the Shogun Council. (Japan)
7th March: Shogun Council Elder Sir Doi compels samurai Shinzaemon Shimada to assemble a team of assassins to kill Lord Naritsugu Matsudaira before he can reach Edo to take a seat on the Shogun Council. (Japan)