Many thanks to @tyt_tmhs for sharing the photo on twipple and to Ayako for tweeting the link!
Keanu Reeves has turned up in Tokyo. There is no news yet as to why but he may be doing research or scouting locations for Rain.
Many thanks to papipo.o who has shared her selfie with Keanu on webstagram.
Ayako has posted additional photos on twitter.
I will be away from a computer until late this afternoon. I will do what I can with my phone. Check the site twitter feed.
Update: I have had a chance to go back and look at the original tweet and run it through the translator, Keanu was spotted in Shinjuku which is one of 23 wards located within metropolitan Tokyo. Shinjuku commonly referes to just the larget entertainment, business and shopping area around Shinjuku Station. You can read more about the area here.