Don't be disappointed when I say it's a different guy. For Byousoku, I assume you meant Makoto Shinkai, Freya.
I don't know the author of The Girl who leapt through time. I'm sure it's not Makoto Shinkai. The Girl who leapt through time is also called Makoto, coincidence.
Nevertheless, both were interesting. Byousoku tends to be more narrative, of course. His movies are all like that