I'm not really sure if this is the right sort of answer per se...
but I think that's a pretty difficult question to answer and it could be the case that there is no person on the site who:
- grasps your question's English sufficiently
- knows the answer
- Feels comfortable answering (maybe because they don't have good quality sources to cite?)
Everyone on the site is volunteering their time to help others and themselves understand Japanese better.
Also for a few of the others ones of yours that I scanned, you've accepted at least one answer that's just speculation rather than sourced.
So my advice would be to expect a question like that to take a while to find an answer. Have you tried searching for an answer to it in Japanese on say 知恵袋?