Last week, he had looked up the old cram school. It was a convenience store now. A quick search of Mr. Yamamoto’s name led to a funeral home’s online memorial registry. Sensei had passed away five years ago.

Then the owner, an elderly man named Mr. Yamamoto—whom everyone called Sensei —had dismissed the police. He had looked at Kenji, not with anger, but with a tired disappointment that was far worse. "You taught my students kanji," Sensei had said quietly. "You taught them that 'trust' is written with the radical for 'person' and the word for 'speech.' And yet, you chose to erase the person from your own word."

Kenji shuffled through the cardboard box in his closet, the scent of mothballs and forgotten time wafting up. He was looking for an old savings account passbook. Instead, his fingers brushed against a creased, yellowed envelope. On the front, in fading ink, was a single word: “Sensei.”

He took out a pen. Slowly, deliberately, he wrote on the blank postcard:

Kenji stared at the receipt. The debt was monetary, yes. But the real debt—the one he could never repay—was the opportunity to look Sensei in the eye and say, “I am no longer the man who stole.”

August 12, 2023. ¥600,000.

Why? That was the question that haunted him as he held the envelope now, retired, his daughter grown. At first, it was poverty. Then, pride—he wanted to send ¥500,000, to prove he was more than his mistake. Then, the shame of the delay itself. Each passing year made the blank card heavier. A postcard that should have taken a year became a decade. A decade became a lifetime.

Twenty-five years ago, Kenji was a scholarship student at a second-rate university in Tokyo. His father had lost his job, and his mother’s small illness had become a large debt. With tuition overdue and eviction looming, he had done something shameful: he had stolen the enrollment fees from the petty cash box of the part-time cram school where he taught.