Shortly afterward, "Ryūjō" was one of many Japanese warships caught in a typhoon on 25 September 1935 while on maneuvers during the "Fourth Fleet Incident." The ship's bridge, flight deck and superstructure were damaged and the hangar was flooded. The forecastle was raised one deck and the bow was remodelled with more flare to improve the sea handling. After these modifications, the beam and draft increased to and respectively. The displacement also increased to at standard load and at normal load. The crew also grew to 924 officers and enlisted men.