We introduce tourist attraction including historic spot "watching" 
We introduce restaurant information "eating" 
We introduce art museum or park which "learn, and are idle" 
We introduce souvenir shop and satelite shop "buying" 
We introduce "staying" hotel information 
Under "mutter sightseeing" to murmur sightseeing information on Twitter every day delivery
  Sound guide "voice navigator" around the Imperial Palace to listen to with cell-phone

Chiyoda Free Wi-Fi SPOT

study, play which learns, and is idle
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Park

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Imperial Palace East Garden (Otemachi Station, Takebashi Station)

Koukiyogaien (Niju-bashi Bridge Station)

Kitanomaru-koen Park

Kitanomaru-koen Park (Kudanshita Station)

Wada storehouse fountain park (Otemachi Station)

Hibiya Park

Hibiya Park (Hibiya Station)

Shimizudani Park (Akasaka-Mitsuke Station)

Chidori-ga-fuchi city park (Kudanshita Station)

Chidori-ga-fuchi city park boat ground (Kudanshita Station)

General Togo memory park (Ichigaya Station)

Brocade Hana Park (Jimbocho Station)