《椿花散落》以江户时代为舞台,冈田准一饰演的主角是道场有名的“四天王”,由于告发了上司的不正当行为而被逐出藩,为完成亡妻遗愿归乡,描绘了武士与藩的不正当行为和权力人物之间的对抗。冈田准一为饰演这一角色已提前3个月开始杀阵的训练。片中西岛秀俊将饰演主人公在道场时期亦敌亦友的情敌。Uryu Shinbei appeals his boss's corruption and his appeal is denied. He is kicked out from the han. Shortly afterwards, his wife Shino collapses from a disease and dies. Right before her death, she tells Shinbei, "I hope you go back to the han and help Uneme Sakakibara." Shinbei and Uneme were friends, but they became rivals to gain Shino's affection. Uneme is also related to Shinbei's exile.