I'm headed to Tokyo for the first time in a few weeks and wanted to get tickets to the sumo tournament. However, the English web site seems to have turned off as of January 4th. I'm wondering if anyone has any advice on how to get advance tickets from the US without knowledge of Japanese (we want to make sure we get in on a particular day)?

I've googled a bit and found buysumotickets.com -- does anyone have experience with them and are they reliable?

Thanks for any advice!!