Shura no Toki: Age of Chaos

Battle in the Darkness (1x19)

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Sakamoto comes up with a daring plan to defeat the Bakufu naval forces that are amassed in the harbour. However, the success of the mission is wholey dependent on Izumi's skills. Ultimately the mission is a huge success but Izumi must leap into action at the last moment to save Sakamoto from another assassination attempt.