The Giants–Tigers game ended 9–1 and Kojima’s elder son returned home…

Kojima went with his teenage son, a Hanshin Tigers fan, to a Giants–Tigers game; Kojima drank beer and his son drank orange juice, and although Kojima was not interested in baseball he used the pauses in the game to ask about and listen to his son’s life, considering those conversations their version of a father–son game of catch.

As his eldest son grew, Kojima stopped visiting Kamakura and likewise became too lazy to go back to Kobe; Umimachi Diary reminded him of what he had lost and what he must not forget. At the end of that summer he went to Hayama with his younger son, and from the train saw the sea where he had played with his father and where he had gone with his first son, and he decided to resume that diary of outings when the younger son is old enough.

Kojima recalled that when his son was small they did all kinds of activities and trips together, but that abruptly ended when his son started junior high and preferred to be with his friends. Since Kojima's own father died when he was thirteen and he had no experience of going through adolescence with a father, he said he did not know what closeness or distance to adopt with his son; he sought guidance by rereading Early Autumn.

Kojima lived near the sea in Tsujido until he was three, and after returning to the nearby Tokyo area in 1996 he took his eldest son many times to the coastal towns of his memories. On one route in Enoshima they saw fish, ate rice with seafood and manju buns, rode the ESCAR toll escalator—which Kojima called a rip-off—returned by ferry and ended the day in a café: Kojima drank coffee, the boy had juice, and Southern All-Stars songs played in the background.

Kojima described his father as a chemist involved in the development of new medicines who, within the corporate structure, was nevertheless a salaryman enduring crowded trains, conflicts with coworkers and persistent fatigue while continuing to work, and who finally managed to buy a house in a Kansai suburb. In that newly created town with no shared past, families and children measured one another by academic background and job title as if playing a card game; Kojima rebelled by choosing the then-young video game industry, where he believed titles weren’t necessary and only a person’s ability mattered.