The Japan Publishing Organization for Information Infrastructure (JPO) supports shared information systems used by Japan’s publishing industry and book trade. Its work includes managing ISBN/Japan Book Codes and magazine codes, maintaining and distributing bibliographic data, and developing publishing infrastructure. The site explains these activities, provides industry reference materials, news, and membership information, and links to related services such as the ISBN Japan Book Code Management Center, JPRO Publishing Information Registration Center, bookstore master administration, and the publishing bibliographic database. It describes the systems used to identify publications and circulate their catalog information across Japan’s publishing sector.