Xysticus croceus is a crab spider in the genus Xysticus found in Nepal, Bhutan, China, Korea, Taiwan, and in Japan,Platnick 2007 where it is called "yami-iro kani-gumo".Xysticus croceus It is about 7 mm long
It looks in grass and fallen leaves for prey to eat. It hides under stones in the winter, and is often seen in spring and early summer.
Footnotes
References (2007): The world spider catalog, version 8.0. American Museum of Natural History.