天王洲First Tower, Office skyscraper in Shinagawa district, Japan.

Tennōzu First Tower is a 27-floor office skyscraper located in the Tennōzu Isle waterfront district of Shinagawa, Tokyo. The building has a glass-heavy facade with wide windows that let in natural light across most of the interior spaces.

The tower was originally named Tokyo MI Building. In 1993, the roof was used to film the opening of the TBS drama Dare ni mo Ienai, and the building was credited under its former name. It now houses the headquarters of Grims and One Two Ten Holdings.

The ground floor of the tower has several cafes and restaurants that serve both office workers and passing visitors throughout the day. This mix of people coming and going gives the lower level a social energy that contrasts with the quieter upper floors.

The tower connects directly to Tennōzu Isle Station, making it easy to reach by train without needing to navigate complex exits. The building is generally open on weekdays during standard office hours, which is worth keeping in mind before visiting.

The building was originally called Tokyo MI Building; in 1993 the roof was used to film the TBS drama Dare ni mo Ienai, and the opening credits list the Tokyo MI Building as a filming cooperator. The current name came later.