only once a year in Mitaka national observatory,
in the day of Stars and Planets,
inside of Einstein Tower is opened to public.
it is not just a tower for astronomical observatory,
rather it is a secret institute for old astronomers,
or a base, or even fortress in the fantasy films we all have seen.
unfortunately, it was a bit too dark for my minilux..
oh well, I'll remember them, or I could just come back again next year.