A consultant for the board of education in Kadoma, Osaka Prefecture, was arrested Monday for allegedly producing and hiding in his home some 10,000 pornographic photos of about 90 underage girls he had sex with, police said.

The education board member, Koichi Shizuku, 47, was earlier arrested for allegedly committing an indecent act with a minor. According to police, he has admitted taking the pictures and videos after Osaka Prefectural Police seized compact discs and other materials containing photos of girls under 18 from his house during a search following his first arrest July 17.

Police allege that between 1:30 p.m. and 3 p.m. on July 10, Shizuku paid a third-year junior high school girl 40,000 yen to have sex with him at a hotel in Nishinomiya, Hyogo Prefecture. He took pictures at the time with a digital camera and allegedly produced child pornography with them.

He has also admitted taking similar photos on other occasions since July 8.

Shizuku was initially arrested for alleged indecent conduct with a female high school freshman at a hotel in Sakai, Osaka Prefecture, in January. He paid the girl 50,000 yen, according to police.