I think there are surrounding factors that are leading to RPG sales reductions, which all have to do with the consoles they are on, as well as the home market of JRPGs.
Japan has moved the vast majority of their RPG production to handhelds. Most of the major JRPGs are now on handhelds, which is hurting the consoles quite a bit.
Which is why you argue only console sales, as to avoid the massive growth on handhelds. Handhelds have 17 million sellers this generation vs. 6-7 last gen on the GBA, and have PLENTY more to go with DQIX coming out soon, among others.
Horrible comparison FTW! WRPGs are flourishing on consoles this gen, and JRPGs are still doing very well, but mainly on handhelds. You can't argue the success of Pokemon Platinum (best selling non-primary Pokemon in history) or Monster Hunter 2/2ndG.
What console JRPGs have come out that should have done 1m to be in your ranking? Lost Odyssey will get there. Outside of that one, there have been oh-so few that deserved it. Looking at last gen, the majority of JRPGs that were million sellers on consoles (that is to say the PS2 and GC) were the uber-hitters that haven't come out yet on consoles like the Final Fantasy and Dragon Quest series. Yet the DQs and FF's that have come out, have done spectacularly on handhelds.
Back from the dead, I'm afraid.
