I just found this FREE iPhone app called “Milpass, Inc.” which has all the nursing rooms in Japan! You can personalise it by uploading a photo of your baby on the front page, and it also has a cute diary for recording the growth of your baby. The nursing room locations can only be searched in Japanese, but if you allow it to use your current location it will show you the closest nursing rooms on the map and how to get there. Check it out on iTunes store!