Hyatt has announced the official opening this week of the Andaz Tokyo Toranomon Hills hotel, boasting vertiginous views over Japan’s capital from the top six floors of the 52-storey Toranomon Hills tower.

The twelfth hotel to join the Andaz brand was developed as part of an urban engineering project integrating central Tokyo with the bay area, in works that will eventually the Tokyo 2020 Olympic Village.

The hotel has teamed up with the AO Spa & Club – which occupies the 37th floor of the tower – to offer guests a range of wellness facilities. The 1,350sq m (14,350sq ft) spa and fitness centre overlooks the Imperial Palace grounds and features a 65 ft (20m) swimming pool, a unique carbonated bath, floating jet bath, a fully-equipped fitness suite in addition to five spa treatment rooms.

AO Spa offers a tailor-made treatment approach called “Jiyujizai,” a Japanese term meaning “your creation.” Products are chosen to reflect the indigenous botanicals of Mount Fuji and surrounding areas, featuring a wide variety of fresh fruit, fresh and dry herbs and natural minerals such as salt and clay. The spa is also introducing a high performance, immediate results-orientated European skincare line called Natura Bisse, to suit demanding Tokyo lifestyles.

The Andaz hotel itself contains 164 guestrooms, including eight suites spread throughout floors 47 to 50. Floor 51 will host the Andaz dining facilities, with 5m (16ft) floor-to-ceiling windows providing a panoramic perspective of the Japanese capital.

In decorating the new Andaz, interior designers Toni Chi of New York and the Tokyo-based Shinichiro Ogata have used natural materials such as washi paper and Hokkaido walnut to reflect Japan’s cultural emphasis on beauty and purity of form.