Square Inc. has just scored its oldest customer ever — a 1,200-year-old Buddhist temple in central Japan.

Visitors to Mount Koya in Wakayama Prefecture, a UNESCO World Heritage Site, will be able to buy souvenirs and pay entry fees using Square's white credit card readers, according to a joint statement from the payments company and the religious group operating the facilities.

The service will start in time for the Golden Week holidays in early May.