Japan culture center - The origins of this festival originated in China and were introduced to Japanese society at the time of Nara. The story begins in the love story of two men named Altair (Hikoboshi) and Vega (Orihime). Hikoboshi was a cow herder, while Orihime is a princess who has the skill to weave. They abandoned their jobs because of that love, and this makes the king angry heavens so that they both use the river separating Amanogawa.
Orihime and Hikoboshi can only be met on the night of the seventh month of the seventh every year, through a magical bridge. If on the night of rain, rivers will overflow their disjunctive and they have to wait until next year to re-meet.