I think I'd much prefer to go to Taipei right now, but career-wise I think Tokyo and Seoul would be the only quick options with least change to daily work.
Taipei I think would have a more free attitude in terms of cultural understanding and hierarchies. I've made a tiny bit of progress with the language and would love to continue -- I like learning Chinese. It's certainly where I was thinking I'd want to go next... (if China doesn't also ruin that).
To be honest, I'm fatigued with learning new languages, not knowing enough to make local friends, not feeling like I can find a stronger social network because of cultural barriers... all these would be worse in Seoul or Tokyo, but through my life as an expat I have learned ways for overcoming this. Maybe I'm better at learning languages now, so it wouldn't be too bad... maybe.
I'm just thinking if we have to spend one more year locked up, we might as well be locked up in Japan or Korea and have a bit more freedom to travel if needed and a new city/culture to explore. Who knows what will happen after that...
The biggest problem and the only reason why there is any question about this is laziness to move and my own job/career taking off here... It's certainly a very difficult -- yet highly privileged -- position to be in. But I've been thinking before letting my job "taking off" any more, I might as well get that starting point somewhere else...
As for financial jobs in Seoul/Tokyo -- no, that's right, it's not the "centre" and maybe a step back to a smaller/regional office, but at this point it's about life quality balances with career progress.
From what everyone says and my own personal opinions/experience, I think either city could be good fun.
those houses look nice -- thanks for the links. The views from them (and limited windows?) is not even in the same world of comparison to the kind of green view we get from our HK flat/terrace.
(Thanks for letting this be my sounding board...)