An information analysis device includes: a receiving unit for receiving a location registration signal including a sector ID, location registration time information and a user ID subjected to location registration; an extracting unit for extracting a location registration signal of which the location registration time is immediately preceding a target time and a location registration signal of which the location registration time is immediately following the target time, from the location registration signal for each user; and a population distribution calculation unit for calculating population distribution by sector at the target time based on location registration time information and a location corresponding to the sector ID in the location registration signal immediately preceding the target time for each user, location registration time information and a location corresponding to the sector ID in the location registration signal immediately following the target time for each user, and the target time.