If you Google "tantsuzu" you will find a video of a guy shooting an original. The Japanese seem to be the only ones to have used matchlock PISTOLS. Most originals I have seen or handled are very decorated and are all different sizes. Some are as small as deringer size. But the one in the video seems a larger, plain, more military looking.
I've always believed the decorated, medium and smaller size pistols were used as a status symbol or a way to signify rank.
There would be no real practical use for a matchlock pistol. Which is probably why there is no evidence or specimen from Europe. Not in paintings, statues, or anything.
I have never seen a sample of a Middle Eastern or East Indian matchlock PISTOL. Although long arms are quite plentiful. That said, just recently, an Indian Torridor matchlock "PISTOL" just surfaced. It is the first, and only one seen by all the collectors I know. Here again, the pistol is really small, only 9 1/4" long. It is in great condition. It's small size makes me think it was used as part of a costume or status symbol. But, it's still great that one did in fact surface. Thought you would like to see photos below.
Good luck on your quest. Rick.