Nissay Sapporo Building, Office tower in Chuo-ku, Sapporo, Japan.

Nissay Sapporo Building is a 23-story office tower rising nearly 100 meters in central Sapporo, containing office spaces and a four-story commercial section. The structure also features ground-floor dining and retail options alongside its corporate workspace.

The building stands where the former Sapporo No. 1 Joint Government Building once occupied the site, which Nissay Life Insurance acquired in 2000. This office tower replaced the earlier government administrative structure with a contemporary high-rise design.

The low-rise section facing Sapporo Ekimae-dori was named "noasis 3.4" in October 2010, a nickname combining "noa" with the address block Nishi 4. Its B1 floor holds restaurants such as Matsuo Jingisukan and Hakodate uni Murakami, while the 1st floor has a Seicomart and Godiva. In the 1st-floor elevator hall stand Cassina ASPEN sofas, made by the Italian furniture firm Cassina.

The building connects to an underground walkway linking Sapporo and Odori stations, making it easy to access from public transport. Multiple entry points allow visitors to reach different sections of the tower without confusion.

The low-rise section opened on 20 November 2009 and was named noasis 3.4 in October 2010, a reference to its address at North 3, West 4. Its first-floor elevator hall holds a Cassina ASPEN sofa by the Italian furniture maker. The office tower was fully leased by April 2007.