[集腋成裘, jí yè chéng qiúㄐㄧˊ ㄧㄝˋ ㄔㄥˊ ㄑㄧㄡˊ] many hairs make a fur coat (成语 saw); many small contributions add up to sth big; many a mickle makes a muckle#113506
[せんきんのきゅうはいっこのえきにあらず, senkinnokyuuhaikkonoekiniarazu] (exp) an expensive fur coat will not be made with a single fox alone; to rule a country requires many great men