I require DID numbers for Japan and Hong Kong to make a calling card.
Can you suggest where I can purchase these numbers from?

Please avoid using DIDX and also another operator called DIDWW! They have the worst quality service! DIDX has a limit of 2000-3000 minutes per month for each number, which makes it unsuitable for calling cards, whereas DIDWW's systems frequently crash.

We have many clients who come to us for UK and international numbering, but unfortunately, there aren't many good-quality providers available for Hong Kong. You may be able to find one in Japan though. We have encountered several operators who resell either DIDX or DIDWW in some form.

Best regards.