Blackthorne and Mariko test their new alliance as they train Toranaga’s gun regiment for war. Yabushige must navigate his past promises to Ishido when an old friend comes to the village. “Shōgun:1×4” In Episode 4 of “Shōgun,” titled “The Tides,” tensions escalate as John Blackthorne becomes more entrenched in the political intrigue of feudal Japan. He continues to work closely with Toranaga, offering strategic advice for his military campaigns against rival factions. Blackthorne’s relationship with Mariko deepens, revealing the emotional complexities and cultural barriers they face. Meanwhile, the threat from Ishido’s forces looms larger, and Toranaga prepares for conflict. Blackthorne learns more about samurai values, particularly loyalty and honor, as he navigates his role in this new world. The episode explores the themes of duty and sacrifice, culminating in pivotal decisions that will shape Blackthorne’s fate and test his resolve to adapt to Japanese customs while remaining true to himself. As the stakes rise, alliances are challenged, setting the stage for the impending confrontation.