Hello again and welcome to FF!

If possible, we could use a close up photo of this little guy!
Tads are very difficult to identify.
If he was wild caught - visiting the area where he was found will help to identify him.

I'm not sure what type of frog his is -you might start here.
There are additional resources/citations here that might lead you to a tadpole photo?

AmphibiaWeb - Hyla japonica