So PineNut is the name given on his Behance gallery for a Japanese artist and illustrator based in Tokyo.
Beyond that I have little background information. The images on his Behance gallery are often dark, both in emotional tone and subject; and, unfortunately, in the sense that some of the photographs of the work appear to be underexposed. I have not taken the liberty of enhancing any of them.
Several of the projects show works in progress and the impressions being pulled on a series of stone lithographs, in which the artist has lavished lots of textural details. There are also color pieces and sculptural ceramics.
His Behance gallery does not offer a link to another website or blog. I came across this Weibo site, and have no idea if it is officially related or not (use at your own risk).