[Maarten Brands]

It's artwork from these three:

Takeyasu Sawaki, Kenichiro Yoshimura and Mari Shimazaki. The prints in the Okami art collection are made from their artwork. Takeyasu Sawaki is a well-know character designer and art director, known for his work on Devil May Cry and the very special game that is his brainchild, El Shaddai, Ascension of the Metatron. Takeyasu Sawaki exhibits regularly in international art galleries.

Apart from Okami, Kenichiro Yoshimura and Mari Shimazaki are also known for their fantastic character designs for video game Bayonetta and costumes for Soul Calibur.

Their artists' marks are in the prints but I can't tell you which ones which. Also because I think some images are collabs.