I believe your pitch lacks a lot of information
- Paid or unpaid? (Promises of payment in case of being popular, winning a contest or similar are not guarantors)
- Do you have a portfolio? Previous works, documents, etc, anything so artists can see your abilities before applying
- Genre/Category of the story? (What elements can be expected to be drawn, style, complexity, etc)
- Do you have a small summary?
- How many panels per page, how many pages per episode and how many chapters for the whole series?
- If you're not offering payment, what can you offer that is of the interest of the artist to keep them motivated to work on the project and not quit for the sake of having better opportunities?
Why the requirement of the artists being Asian/Mostly Japanese? Is it because you want to aim to propose the series to an editorial from there? Do you need someone with that nationaly to properly represent the culture or history?
I believe that none of the information people are requesting need to be that secretive or handled solely on private, I believe that by providing clear information and a somewhat professional proposal you can filter down applicants and narrow down to what you're looking for.
As well, you've already made threads and people asked you for more but again, you seem to fail to avoid giving any proper detail for what you want