Time adjustment device, timekeeping device, and a time adjustment method

The invention provides a time adjustment device, a timekeeping device with a time adjustment device, and a time adjustment method. The time adjustment device (10) has a satellite signal reception unit (20) that receives satellite signals containing satellite time information transmitted from a positioning information satellite (15); a time information generating unit (22) that generates time information; and a time information adjustment unit (36) that adjusts the time information based on the satellite time information received by the satellite signal reception unit. The satellite signal reception unit includes a positioning information satellite selection unit (33) that selects the positioning information satellite from which the satellite time information is received; and the positioning information satellite selection unit selects a positioning information satellite based on variation in the transmission frequency of the satellite signal transmitted from the positioning information satellite.