Sanno Park Tower is a 44-story skyscraper in Nagatachō, Chiyoda ward, Tokyo, Japan. It is the 8th highest building of the ward, after the Shin-Marunouchi Building, JP Tower, GranTokyo, etc. The building stands over Tameike-Sannō Station, which is served by the Tokyo Metro Ginza Line and the Tokyo Metro Namboku Line, and linked to Kokkai-gijidō-mae …Sanno Park Tower is a 44-story skyscraper in Nagatachō, Chiyoda ward, Tokyo, Japan. It is the 8th highest building of the ward, after the Shin-Marunouchi Building, JP Tower, GranTokyo, etc. The building stands over Tameike-Sannō Station, which is served by the Tokyo Metro Ginza Line and the Tokyo Metro Namboku Line, and linked to Kokkai-gijidō-mae Station on the Tokyo Metro Marunouchi Line.