I Have Old Japanese And Hong Kong Paper Currency But They're About The Size Of Monopoly Money And Worth A Penny. I Need To Know If They Are Worth Anything. Can You Help?

Yes dear!
You can sell this old paper money on the online auctions like eBay. One of such examples is the bid of Hong Kong paper money which was worth around US $2.25. Your paper money will be also near this value.  
value of old money