The invention relates to communication apparatuses and a communication method. The communication apparatuses (nodes), which constitute a wireless multi-hop network, each comprise: a reception unit that receives a sequence number, divisional times, into which a time range, which is allocated to the transmission of detected usage amount data, is divided, and a division number thereof; a transmission offset calculation unit that calculates the remainder resulting from a division of the sequence number, which is received by the reception unit, by the division number and that calculates a transmission offset time on the basis of the remainder and a transmission interval; and a transmission unit that transmits the usage amount data on the basis of the transmission offset time calculated by the transmission offset calculation unit.