Hi,
The mesm tokyo autograph collection looks nice
https://www.marriott.co.uk/hotels/tr...ph-collection/
The location looks quite good also being close to Hamamatsucho JR station, the Takeshiba station for the Yurikamome line to odaiba and the Kyu-shiba-rikyu and not too far from the Hamarikyu gardens which are very nice for a wander.
Regards
TBS