US Patent 7809681 Method for analyzing data and data analysis apparatus

When logs are analyzed, an analysis with consistency is carried out on the presumption that shifting occurs among time stamps of logs output from a plurality of apparatuses engaged in time correction amount. In a log analysis apparatus which receives logs from a plurality of computers for generating a plurality of logs for analysis, for the plurality of logs output from the plurality of computers, a time stamp recorded in each log is corrected based on a time correction log according to a consistency rule among the logs.