YES! According to Kickstarter's help page:
"Anyone, anywhere (with a major credit card) can pledge to Kickstarter projects."
If you don't have a credit card, you can purchase a pre-paid credit card at most convenience stores these days. Buy one in the amount you intend to pledge plus $1. If your bank debit card is linked to Amazon Payments, you can use that to back the project as well. There is plenty of info on alternative pledge methods.