Since 1990 Japan has indeed only added $6tr of Money (M2), but as their GDP hasn't really grown that's an additionall 80% of GDP in terms of Money (the same meausure for the US is up 15%)
China on the other hand, money is up 150% of GDP, which clocks in at $26 Trillion dollars (a bit more than 100% of US GDP).
https://fred.stlouisfed.org/series/MYAGM2JPM189S