I don't know what Ayane picture you speak of, but unlike other entries in the series, DOA4 had the same cover across all regions. There is also a cover that features Kokoro in her kimono, but this is either a fake, or was only used prior to release as a placeholder image.
Additionally, exclusive to Japan, there was a chipboard slipcase that you could get with the game if you had pre-ordered it. It featured Kasumi on the front and Ayane on the back. I have a copy of it myself.
There is also a cover that features Kokoro in her kimono, but this is either a fake, or was only used prior to release as a placeholder image.