３件
How to write Japanese & Stroke order

Check also 件  

Names and idioms with total stroke of 6:
世一  八斗  也已  山小  夕山  

Names and idioms similar to ３件:
何件  暗殺事件  条件文  阿波丸事件  宮永事件  

Check stroke order for the words below:
望花  恋月姫  慎愛  釈菜  眯  赤海亀  入港税  国営公園  縁胸豆叩頭虫