A second man wanted in connection with the biggest robbery in Japanese history was arrested Friday after turning himself in at JR Shinagawa Station.

Yutaka Watanabe, 41, was arrested on suspicion of burglary and inflicting bodily harm in the May heist, in which a security company in Tachikawa, western Tokyo, was robbed of ¥604 million. Another suspect, Hideaki Ueki, 31, was arrested on similar charges early Wednesday.

Watanabe confessed.