@Crimitalis
Based on what little I know, the Birth Rate is low due to the lack of balance between a work life and well anything else.
Can't expect a man to want a family they won't ever see nor a wife who then bares most of the responsibility of maintaining said family.
Then comes the unrealistic expectations set on the people to attempt to have everything while not providing them with the tools needed to get it in the first place and as more time passes, the few people who had the tools in the first place are unable to pass it forward to the next generation as they themselves die out.
The issue could also be attributed to the collectivist mentality held in most East Asian cultures. Where the needs of the many are prioritized over the needs of the one. Which, taken at face value, doesn't seem so bad however, the needs of the one are important and when you live in such a society that seems to shun that belief, you seem isolated from the rest of society and as a result, you isolate yourself from it and live in your own bubble. And at that point, how can you expect someone to want to share their life with you in that tiny bubble you made.
Edit: I don't mean you as in you yourself just as a figurative you.