千番に一番の兼ね合い
せんばんにいちばんのかねあいsenbanniichibannokaneai
expression
- something so difficult that one doesn't know if there's even a 1 in 1000 chance of success
せんばんにいちばんのかねあいsenbanniichibannokaneai
expression
Data from JMdict, KANJIDIC2 (EDRDG), KanjiVG, CC-CEDICT and Make Me a Hanzi. Sources and licences