True, but Japanese companies aren't prone to ruin foreign companies they've acquired by relocating the HQ to Japan.

They do so by bringing Japan into the foreign HQ, i.e. the acquiree's top execs are replaced by the acquirer's execs.

The timezone differences are going to be an issue. We have a couple of Japanese guys in the same team as me, and its tough going. We have a small window in the morning to align on projects and if we ever need to do face to face meetings, we are all reluctant as its a killer long haul flight where you're guaranteed three days of jet lag.