The incident began when Yohei learned that a wealthy man from Aizuwakamatsu City was taking her to Nozaki, and, out of spite, went to the road to lay in wait for them.
彼女を連れて会津若松市のお大尽が野崎参りに出かけたのを知った与兵衛が、嫌がらせに途中の道で待ち伏せたのが事の発端のきっかけである。