
There is a quite a high charge for going this route, which works out at something like 10,000 yen charge on a 1,000,000 yen tax payment, so it only makes sense if you have a cash back or point back rate of over 1%, but for those of you with say a Sony Wallet card with 2% cash back status, it could be a good way of saving around 1% on your tax bill (all percentages here only approximate btw).
