A relationship analysis device (100) is provided with: an event extraction unit (130) which extracts a plurality of events from a plurality of sets of time-series data; a period calculation unit (150) which obtains an event period during which each event of the plurality of events continues to occur; and a group generation unit (160) which combines time-series data that includes a plurality of events having commonality in event feature quantities and event period into a single group.
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