To prove true to his girlfriend, a Japanese man who stole 340,000 yen ($2,300) from a post office returned more money than he stole.

The 33-year-old stole the money at knife-point from a post office in western Tokyo in March. When he repented he went back to the post office at the end of May and left 350,000 yen in an envelope on the counter before running off, as was "sorry for what he had done", the Mainichi newspaper quoted the man as saying.

On Sunday, he turned himself in to the police, Asahi TV reported. "I did the robbery because I was short of money. I didn't want to get arrested when I took the money back, but I talked to my girlfriend about it and thought I should clear things up quickly for her sake."

A Tokyo police department is still discussing what to do with the extra cash, reports Reuters.