Every day for 47 years, Mr. Hamano rowed a wooden ferry across a river in Japan. Back and forth. The same line across the same water. About two hundred thousand crossings. He is 81 now. Retired. This July, he boarded his first airplane, bound for America, to see one thing. A young soldier who walks back and forth. Mr. Hamano is the grandfather of Daigo, who grew up in the apartment above mine. Daigo is 26 now, an engineer in Virginia. He told me this story over a beer last month, and had to stop twice. His grandfather ran one of the last hand-rowed ferries in Japan. A flat wooden boat, one long oar, a little hut on the bank with a bell. You rang the bell, and he came. Rain, snow, typhoons. He never once left someone waiting on the other side. When he finished a crossing, he always said one word. "Yoshi." It means something like "Right. Good. Done properly." He has said it about two hundred thousand times. In 2011, Daigo's grandmother was dying in the hospital. On her last morning, it was the day of the university entrance exams. A high school girl from across the river rang the bell at 6 a.m. His grandmother told him: "Go. Somebody's waiting on the other side." He went. He rowed the girl across. Then he hurried back to the hospital and held his wife's hand until she was gone. He has never talked about that morning. Daigo heard it from his mother. In September 2003, a hurricane hit the American East Coast. Mr. Hamano saw it on the little TV in his ferry hut. A cemetery in Virginia. Wind tearing the trees sideways. Everyone told to take shelter. And one young American soldier, in full uniform, still walking. Twenty-one steps. Turn. Twenty-one seconds. Turn. Twenty-one steps. The Tomb of the Unknown Soldier, at Arlington. Guarded every minute of every day since 1937. By soldiers who volunteer for it. The news said the guards had been given permission to take shelter. They refused. Mr. Hamano watched that soldier walk through a hurricane, and he said one sentence to an empty ferry hut. "That one understands." He waited 23 years to go and see him. Daigo had a whole trip planned. New York. Washington. A ballgame. His grandfather said no. "Only the soldier." It was July. 96 degrees. Virginia humid, which Daigo says feels like being licked by a very large dog. His grandfather stood at the rope for two hours. He took out his old wristwatch and timed the steps. Twenty-one. He timed the pause. Twenty-one. And every single time the soldier turned, Mr. Hamano nodded and whispered, "Yoshi." Every turn. For two hours. Daigo says a family from Ohio started watching his grandfather instead of the soldier. Then the sky turned black. A summer storm. Thunder close enough to feel in your teeth. Rain like a waterfall. In about a minute, the crowd was gone. Running for the buses. Umbrellas everywhere. Daigo opened his umbrella over his grandfather. His grandfather closed it. Daigo opened it again. His grandfather closed it again. "Grandpa, you're 81. You're going to get sick. He's a soldier. It's his job." His grandfather didn't take his eyes off the mat. "The ferry was my job," he said. "Did I stay home when it rained?" So Daigo stood there, holding a closed umbrella, getting soaked next to his grandfather, who was wearing a canvas hat and would not move. They were not the only ones. A teenage boy, maybe fifteen, had stopped halfway to the bus. He saw the old Japanese man standing in the rain. He turned around and stood at the rope. Then his father came back with an umbrella to get him. He saw his son. He saw the old man. He closed the umbrella. By the time the guard changed, there were nine people standing in the rain. Nine closed umbrellas. Not one of them spoke. The new sentinel came down the steps, and the inspection began. The rifle. The uniform. Every crease. In pouring rain, exactly the same as on a sunny day. When it was over, and the old guard marched away, Mr. Hamano took off his canvas hat and bowed as low as his back would go. The same bow he gave the river after his last crossing, the day he retired. Then they walked to the bus, wet to the bone. About forty minutes later, at the visitor center, a young soldier in uniform walked straight up to them. "Sir. Excuse me. Were you the gentleman at the Tomb, in the rain?" Daigo said yes. "One of our sentinels just came off the walk. He asked me to find you. He saw you close the umbrella. He saw all of them close." The soldier stood up a little straighter. "He said to tell you: thank you for standing the post with him." Daigo translated it. His grandfather looked down at the floor. After a while, he asked Daigo to translate something back. Exactly. "Tell him: 47 years. A ferry. Back and forth. Every day. Somebody always waiting on the other side." He nodded and left. Ten minutes later, he came back. "Sir. He says: 'Then you know.'" Daigo had never seen his grandfather cry. Not at his grandmother's funeral. Not ever. The old man put his canvas hat over his face, right there in the visitor center, and cried like a boy. The young soldier stayed exactly where he was, at attention, until he was finished. Mr. Hamano went home to Japan. The ferry runs with a younger man at the oar. But Daigo's mother says that every morning at six, his grandfather still walks down to the river. If it's raining, he does not open his umbrella. He stands on the bank for one minute, facing east, toward the morning. Toward a soldier who is walking, right now, in Virginia. He doesn't talk about America much. When people ask what it was like, he gives them the same one-word answer he gave the river for 47 years. "Yoshi."