Chiyoda-ku is one of the 23 special wards in centra Tokyo,
Japan.
Chiyoda was founded on March 15,1947 by the unification of Kanda
Ward (the northeast corner of present-day Chiyoda, around Akihabara
Station) and Kojimachi Ward (comprising the rest of Chiyoda).
Minato-ku is one of the 23 special wards of Tokyo, Japan. Minato is
located southwest of the Imperial Palace and has boundaries with
the special wards of Chiyoda,
http://www.answers.com/topic/ch-tokyo, Koto (in Odaiba), Shinagawa,
Shibuya and Shinjuku.