Its ultra-loose stance has accelerated Japanese investment flows abroad, helping to turn the yen's slump into one of historic proportions.
Its net international investment position, the difference between the stock of assets it holds overseas and stock of Japanese assets held by foreigners, was $3.29 trillion at the end of June.
International Monetary Fund figures show that of Japan's $9.96 trillion assets overseas, around $3.7 trillion is in equity-related investments, and some $5.7 trillion in debt instruments, including official reserves.
Deutsche Bank strategist Alan Ruskin says a YCC change could have spillover effects that could last for a few weeks.
Meanwhile, Japanese retail foreign currency deposits at domestic banks rose to 26.58 trillion yen ($182 billion) at the end of August, up 8.3% since the start of the year.