Police have arrested a store manager from Kyoto on suspicion of stabbing to death his former girlfriend, whose body was found earlier this week on a path in Kameoka, Kyoto Prefecture, police officials said.

The police allege Takashi Okamoto, 47, who turned himself in Thursday, fatally stabbed Eiko Yamada, 32, in the neck with a knife or other sharp weapon between 7:35 p.m. and 8:50 p.m. on Sept. 14.

Okamoto has owned up to murdering his ex-girlfriend, describing how he approached her from behind, shoved her to the ground and then stabbed her in the front of the neck, they said.

"There is no doubt that I killed her. I wanted to get revenge for the quarrel we had over breaking up," he was quoted as saying.

Investigators said the two were seeing each other until August. The police believe Okamoto, who was familiar with Yamada's daily routine, left his eyeglass store around 7:30 p.m. on Sept. 14, knowing she would finish work around the same time at another eyeglass shop nearby. Their two stores, just a few hundred meters apart, are run by the same firm.

Police said Okamoto, from Ukyo Ward, was recorded by a security camera near the site where the victim was found around the estimated time of her death. Yamada's body was found covered in blood from stab wounds to her neck.