Wireless tag communication apparatus and wireless tag communication method

A wireless tag communication apparatus, comprising:

• an antenna configured to read a radio wave transmitted from a wireless tag attached to an article;
• a reading device configured to read, on a basis of the radio wave received by the antenna, tag data of the wireless tag including an identification code of the article;
• and
• a warning device configured to perform, on a basis of a scheduled list that is a list of identification codes of articles to be disposed in a disposed region for shipment and a read list that is a list of identification codes of articles read by the reading device, warning processing indicating a possibility that an article disposed in the disposed region is different from any of the articles corresponding to the identification codes in the scheduled list.