Her Red Knit Cap Girl series is just darling -- I love the adventures with her little animal entourage and of course, her signature red cap. I think I need to snag one of those hats...
Naoko's Brown Paper Bag collection is quite impressive -- inspired by a variety of used papers like vintage books and envelopes, she used brown paper grocery bags as the base for all of her artwork in this series. I think the repurposed materials make these works all the more charming, don't you?
She also has several holiday-themed pieces, which are oh-so-cute and festive. Naoko offers several different notecard sets and all sorts of prints that would be great for giving to someone special this holiday season. I just bought the Winter Trio set of cards last month, and I love 'em so much that I've decided to keep and frame them for myself! (Merry Christmas to me :P )