More than 100 social insurance offices across Japan experienced problems Sunday with a computer system containing public pension records, making it impossible for staff to respond to inquiries from people seeking advice for about 90 minutes in the morning.

The problem with the computer system came to light at around 8:30 a.m. Sunday at 130 social insurance offices in 23 prefectures, an hour before they opened for pension consultation services, officials of the Social Insurance Agency said.

It was the first weekend since the government agency set up ad hoc pension consultation booths at 309 regional offices nationwide to deal with people concerned about the possible loss of their pension account data.