Evergrace wouldn't have made the Top 10 in 2007. When PS2 launched it's games may have been reaching the top ten, simply because they're wasn't much competition. In contrast PS3 is out alongside another far cheaper console that's got the buzz factor, and the runaway DS, and the massive PS2 install base.
To get into that top ten, a game would have to sell to 10% of the PS3 install base, which is a lot for pretty much any game, especially for one week. Most of the really big franchises don't reach that percentage of console owners. Looking at the Wii, WiiPlay got on the list by selling to 4% of Wii owners in one week. It's in having a large install base that a 4% figure gets it into the top 10 sales. Likewise .hack topping the chart despite selling to a tiny percentage of installed PS2s.
There's no reason to think PS3 will feature heavily in Japan's top ten until either there's a substantial install base, or games with massive appeal that most PS3 owners buy it.
Agreed - that's their problem. Systems aren't selling and they don't have killer apps to seperate themselves from the competition.
Bigger problem is Japan typically chooses a victor and rallys behind them the whole generation. (see ps2 vs gc/xbox ... ds vs psp ... super famicom vs mega drive)