YOKOHAMA, JAPAN - A primary school teacher and his wife were arrested on suspicion of using a hidden video camera to secretly film people inside a women's toilet at a public park in Yokohama on Sunday, police said.

Noriyoshi Sano, 44, a teacher at a private primary school, and his wife Naoko, 42, a company employee, from Kawasaki, were arrested on the spot, police said.

According to the police, at about 4:05 p.m Sunday, the suspects allegedly filmed a 43-year-old unemployed woman of Yamato in the prefecture with a video camera placed inside a toilet paper roll at the female lavatory of a gymnasium located in Hodogaya Koen park in Hodogaya Ward.

The police said the suspects admitted to the crime and quoted one of them as saying during questioning,"We did it for fun."