Originally Posted by
HawaiiO
In my experience, cash is king in Japan and tons of places do not accept MC/VISA/AMEX.
Train stations, restaurants, smaller hotels, places like that.
Be sure to have back up cash and check beforehand if the location accepts CC.
Also some ATMs there do not take our US cards for withdrawing cash.
Like most places in Asia there is a credit card price and a cash price. Rule of thumb for Akihabara is 3-5%.