Entarō Hōjō, father of Shūsaku Hojo and father-in-law of Suzu Urano, serves as an aircraft engine engineer at the Hiro Naval Arsenal in Kure. This position places him within a vital military production facility, exposing him directly to the Allied bombing campaigns targeting naval infrastructure. His character is defined by calmness, composure, and a serious disposition; he rarely displays anger or emotional outbursts. This stoic nature makes him a stabilizing presence within his family, residing with his wife San, son Shūsaku, and daughter-in-law Suzu, often contrasting with their more expressive temperaments.

During the intensified U.S. air raids on Kure in 1945, the Hiro Naval Arsenal sustains devastating attacks. Entarō goes missing after one bombardment, causing family distress. He is later found alive but injured at Kure Naval Hospital, confirming his survival while revealing the physical toll exacted on civilians supporting the war effort. In a significant moment, Entarō informs Suzu of the battleship Yamato's sinking, acting as a conduit between the naval port's grim realities and the family's understanding of Japan's deteriorating war situation. His connection to military production lends this disclosure weight.

Following Japan's surrender, Entarō returns to the Hojo household, participating in the family's postwar adjustment. His wartime experiences—enduring workplace peril and sustaining injury—contribute to the narrative of civilian endurance, yet his fundamental traits of reserve and reliability remain unchanged.