From the Google Maps blog:
September 12th is 'Space Day' in Japan, and we are celebrating by releasing new, comprehensive Street View imagery for two of Japan’s top scientific institutions: the Japan Aerospace Exploration Agency (JAXA) and the National Museum of Emerging Science and Innovation (Miraikan). With panoramic imagery in and around these locations now available via the Street View feature of Google Maps, space enthusiasts around the world have a more complete and accurate sense of what it’d be like to virtually swap places with an astronaut.
More here. (Thanks, Nate Tyler!)