This cute little bottle is one of the many offerings from the Natchan juice line by Suntory beverages (the link is Japanese, btw). It started out with Natchan Orange, and has since expanded into a variety of juice flavors. This one is a White Peach Natchan, a limited edition flavor. Upon opening the bottle, you could not miss that this was peach juice- the smell was really really strong, and really sweet. As expected, the juice tasted really strongly of sugary peach syrup. Unfortunately it was a little too much for me and I couldn't finish this bottle. But I think it would be awesome mixed into club soda, or better yet, some vodka!
If you happen to come across any of the Natchan juices, I'd recommend you try it out for the fun of it. Half of the appeal is the super-cute mascot/face on the bottle anyway :o)