For as long as I've been working in mobile telecommunications, Japan has always been the leader in mobile network development. A recent look at one of Japan's crowd sourcing apps, RBB Speed Test, shows some pretty amazing speeds for mobile data. While we might expect to see a maximum download of 60-70 megabits per second (Mbps) in California, in Japan, it's more than three times as fast. For upload, we're used to seeing between 5-10 Mbps; for the crowd source results below, the increase is not as large (17.1 Mbps).
See the table below for the top ten speeds from November 13. Number 1 was a test run on NTT DoCoMo's LTE network using a Sharp SH-01H (link to GSM Arena here) (link to Sharp's Japanese page here).