I have the same single page site, with only one link inbound on page on for it's kw1+kw2 two short words.. IT context..on page one in top 3 ( depending on the time of day it moves from # to #2 or #3 ) on Google.com 850,000,000 results returned ..and on Google.jp also on page 1 at position # 5 or 6 or 7 or 8 again depending on time of day ( or it may depend on the DCs I'm hitting when searching ..need to look over aperiod of at least 7 days or maybe 30 )..results from 1,300,000,000 results returned ..in both cases there is also "wired" and another well known tech/web site high on the page..I would have expected the pages from both of them to rank wwell for the queries..
The top 3 spots on .jp are all Japanese language only ..massive backlinks ..and the #2 and#3 spot are the same site..
I wasn't aware that serps on Google.jp placed a Kanji translation next to the page title, if it was in English..explains some of the Japanese traffic I'm getting that I had not bothered to investigate or attempt to translate as yet..testing other sites built using the same principle ( but not all single page sites by any means ) I find they are in about the same place as they are in Google .com ..so I'm happy with them..and Japanese Google serps..now to think of a way or ways;-) to put this to good use..
this is not personalised results as I'm not using the same machines nor the same IPs..
One thing I do notice is that ehow is getting higher positions on on these searches and others I've tried on .jp than on .com ..so although these may be more similar to the .com serps of a few months ago ( where my pages /sites were at mostly the same places as now, not having been affected by Panda ) they favour ehow and other content farms and MFAs etc more than the .com serps..