Tecmo Koei is the latest company to announce its sales figures in Japan and there's some decent numbers out with Toukiden reaching the half-a-million point (with the expanded version to come soon, plus the promise of new games and content) along with Samurai Warriors continuing to sell.
More detail here, but overall, sales and profits were up. Western sales declined somewhat but are expected to pick up over the rest of the year.
550,000 units of Toukiden for PSV and PSP (global)
340,000 units of Samurai Warriors 4 for PS3/PSV (Japan)