METHOD AND DEVICE FOR DETECTING CORRELATIVE ITEM, METHOD AND DEVICE FOR INTRODUCING RECOMMENDED ITEM, CORRELATION ITEM DETECTION PROGRAM, RECOMMENDED ITEM INTRODUCTION PROGRAM, AND STORAGE MEDIUM STORING PROGRAM

摘要

PROBLEM TO BE SOLVED: To rapidly detect correlative items. SOLUTION: An access history processing part 13 processes an access history transmitted from an item provider server to produce access history map data. Using each item recorded in the access history map data as an original item, a correlation item analysis processing part 12 previously finds an item group (single relationship item group) correlative with the original items. When a correlative item detection request is outputted with an item identifier (analysis item) serving as a source of correlation item analysis from the item provider server 2, a rapid introduction processing part 14 extracts a list of an identifier (rapid relationship item group) of a single relationship item group recorded in a pair with the original item matching an item as a source of the correlation item analysis and performs narrowing.