Japanese devs. love to properly craft their product and dare to go beyond what we conceive as a video game or improve a genre drastically. Ico, Shadows, and now The Last Guardian are great examples. For my point in genre, Metroid, Final Fantasy, Streets of Rage, Street Fighter, TMNT: Turtles in Time, Snatcher Silent Hill, Chrono Trigger, Vanquish, Bayonett, Xenogears, No More Heroes, , Mario and Sonic, Gran Turismo, Legend of Zelda, and countless others have helped their genres in one way or another.
This isn't to say western devs. are slouches. Mortal Kombat, Sly Cooper, StarCraft, Halo: Combat Evolved, Call of Duty 4: Modern Warfare, doom, Fallout, Mass Effect, Folklore, God of War, Half Life, Portal, EverQuest, Dota, Forza, Gears of War, Killzone, Counter Strike, Diablo and others are also influential. My issues stems from time frames by the publishers via cutting corners to meet deadlines. Activision and EA are the pinnacle of said practice. This isn't to say Japanese publishers are innocent either. Capcom, SEGA, Konami, and now to a lesser extent in Square Enix all have done similar practices or just destroy franchises all together.
For me, Japanese devs. just seem to have more pride and thought when creating a game. Even going back to gamings early days, Japanese devs. knew what it took to appease people. Companies now like Platinum, Xseed, Sura 51, Atlus, NIS America and others now feel the pressure of creating games even more so than western devs. do. For a western dev even like GearBox can take a hit from a game like Duke Nuken Forever. A Japanese dev. cannot as funds are limited due to the market they need their products to succeed.
At the end of the day, Japanese devs. need to exceed expectations even more unless they have established IP in the west to make a comfortable living. Therefore, the old term of "Quality over Quantity" is really amplified here.