The New Yorker's got a chunk of it:
At Koenji Station, Tengo boarded the Chuo Line inbound rapid-service train. The car was empty. He had nothing planned that day. Wherever he went and whatever he did (or didn’t do) was entirely up to him. It was ten o’clock on a windless summer morning, and the sun was beating down. The train passed Shinjuku, Yotsuya, Ochanomizu, and arrived at Tokyo Central Station, the end of the line. Everyone got off, and Tengo followed suit. Then he sat on a bench and gave some thought to where he should go. “I can go anywhere I decide to,” he told himself. “It looks as if it’s going to be a hot day. I could go to the seashore.” He raised his head and studied the platform guide.
At that point, he realized what he had been doing all along.
Read the rest here.