Just back from a few days (and nights) in 2KO, and I was shown a newsletter issued by the JAL Pilots' Union stating that 650 pilots will be retiring from JAL alone, over the next 5 years.
I imagine ANA will be in a similar predicament.
There's absolutely NO way there will be anywhere near that number of Japanese pilots available to replace those sorts of numbers, and additionally, the training system wouldn't be able to handle it even if they were......it works out at over 10 retirements per month, EVERY month, for the next 5 years!
So be prepared for some further advertising for gaijin - the first offer might not be the BEST.