Japanese customers hold approximately US$1 trillion of US Treasury Bonds

"Japan is also the second-largest foreign holder of American debt behind China, with approximately a trillion dollars in US Treasury bonds."

Source: Double the sales tax? Japanese see hit to wallets, little impact on national debt

By Gavin Blair,

Correspondent

June 26, 2012

http://www.csmonitor.com/World/Asia-Pacific/2012/0626/Double-the-sales-tax-Japanese-see-hit-to-wallets-little-impact-on-national-debt