For PS3/X360 gen, it could be assumed (which in hindsight was a bad assumption) that the PS3 would do at least as well as the PS1 or PS2. There was nothing to indicate that PlayStation consoles would start declining in popularity and sales starting with the PS3 generation. Basically while the Japanese economy was in decline the PS brand had continued to grow despite that. But with hindsight it was obvious that PS3's price was far too high and combined with a steady decline in buying power for the average Japanese resident, this lead to many PS gamers not getting a PS3. Noone in the Japanese gaming industry could have predicted that PS3 would sell roughly half as many consoles as the PS2 did in Japan.
Capcom's approach was more aimed towards making itself more attractive world wide as well as within Japan. Basically, worldwide sales represented a potentially massive growth opportunity for the company and its revenue. But that doesn't mean that Capcom wanted to become irrelevant in the Japanese market or that it wanted to take a reduced role in the Japanese market. This meant an increased investment in consoles other than Japanese made consoles as well as starting their PC initiative. They are one of the first if not the first Japanese company to really embrace the PC platform.
I guess, some might view their partnership with MS for the X360 launch as moving away from Japan. However, for X360, Microsoft had committed to a massive push to try to break into the Japanese market. The timing was right for Capcom who happily took a lot of money from MS in order to start a couple new franchises (Dead Rising, exclusive and Lost Planet, timed exclusive). That said, both were still very much developed with an eye first towards the Japanese market with attempts to make them more attractive to Western markets. Zombies but with 3rd person action oriented gameplay versus the slower paced RE gameplay for Dead Rising. Mech combat with traditionally clunky Japanese controls for Lost Planet. But at the same time they didn't stop developing their traditional Japanese roster of games.
And hindsight being what it is. If they had focused mostly on the Japanese market, they may no longer exist as an independent company due to how poorly PS3 did in Japan compared to PS1 and PS2. As it was even with a more global approach and embracing more platforms, the PS3/X360 generation was hard on the company.
Regards,
SB