Date: Every year in the beginning of May (three day event)
Place of Event: Nanao City (Uo-machi Kaji-machi Fuchuu-machi)
Related Website: Seihaku Festival (Blue Oak Festival)
Dekayama Preservation Society Official Site (Japanese Only)
Seihaku Festival is a Spring Festival held at the Ootokonushi (Sanno) Shrine. It is a place to pray for peace and good harvest and people visit here from the towns in the surrounding areas and present three Dekayama or huge festival floats.