Dear Adobe Stock,
Have question about accessing, our main office is in Los Angeles USA, if I purchase my account from USA, will I be able to download files when I'm in our Japan or Taiwan office?
There shouldn't be an issue with downloading Stock files in different countries.
However, when signing up for Adobe Stock, the country of your Adobe ID needs to match the billing address associated with your payment method. The country associated with your Adobe ID is Taiwan so purchase options would be different from the US.