Time information obtaining device and radio-controlled timepiece

A time information obtaining device which receives a radio wave including time information to obtain the time information from the radio wave, the time information obtaining device comprising:

• a code identifying section which identifies each code of each of code strings in the received radio wave;
• a first portion parity calculating section which calculates a portion parity from each of a predetermined number of the code strings, the predetermined number of the code strings being 3 or more, by subtracting (i) a parity bit of a variable code, which is contained in a predetermined code string portion of a respective one of the code strings and which may change among the predetermined number of the code strings, from (ii) a parity bit included in the predetermined number of the code strings;
• a first portion parity deciding section which decides a first portion parity based on a predetermined number of the portion parities calculated from the predetermined number of the code strings by the first portion parity calculating section;
• a second portion parity deciding section which obtains a second portion parity from an invariable code other than the variable code among codes of the predetermined code string portions of each of the predetermined number of the code strings;
• and
• a parity confirming section which confirms a match between the first portion parity decided by the first portion parity deciding section and the second portion parity obtained by the second portion parity deciding section.