However, the "Fubuki" class also had a number of inherent design problems. The large amount of armament combined with a smaller hull displacement than in the original design created issues with stability. Despite design features intended to reduce weight, including use of welding on the hull and lighter alloys above the main deck, the ships exceeded their design weight by over 200 tons, which was even more of a problem with the Group II ships, with their larger bridge and heavier gun mounts. After the "Tomozuru" Incident, in which the top-heavy design of many Japanese warships called basic design issues into question, additional ballast had to be added.