Tokyo police have arrested a man on suspicion of murdering the president of an audio equipment-related company who was found dead at his apartment in Tokyo¡¯s Ota Ward last week.

The Metropolitan Police Department on Friday arrested Masahiro Yamanaka, 45, the company¡¯s sales manager, on suspicion of killing company President Akihiro Kawashima, 44, a day earlier, investigative sources said.

According to investigators, Yamanaka told police during voluntary questioning on the same day that he was dissatisfied with Kawashima¡¯s attitude. He said, ¡°I sprayed insecticide that was at the entrance into his face, and when he faltered, I stabbed his thigh and neck with a fruit knife I had brought to threaten him.¡±