The samples are paid-for and produced specifically for commercial use, so Mitsuda isn't "borrowing" anything. Actually he uses his samples quite artfully, building clever rhythmic structures and harmony around whatever he uses. Most musicians/music producers just load up the samples and call it a composition (especially in rap/hip-hop, film and western game music). Mitsuda doesn't base his work around samples, he uses samples to add color to his work.
(And yeah, the Chronopolis electronic rhythm thing is also a library sample)
