One of my favorite bloggers, Reya, has this to say:
Reya Mellicker said...
"Butternut Squash of the blog Goddess at the Confluence (who knows Asian languages) tells me this spam is a Japanese porno ad. If you use certain words like "pink" for instance, the spam finds your blog.
After awhile they give up.
But - comment moderation is a good thing. Why not?"