| Competition | 1995 |
| Completed | 2001 (opened January) |
| Location | Jōzenji-dōri, Aoba-ku, Sendai, Miyagi, Japan |
| Plan | 50 × 50 m, 7 floors above grade, 2 below |
| Structure | 13 steel-lattice tubes (ø approx. 2–9 m) carrying flat steel floor plates. No columns, no beams. |
| Skin | Double-skin glass on the south façade |
Ito reduced the building to three elements: plates, tubes, skin. The plates are steel sandwiches welded like a ship's hull. The tubes are woven from steel pipe and carry the floors, the light, the air and the stairs. The skin is glass, so the building is read as a section rather than an elevation.
In March 2011 the Tōhoku earthquake shook Sendai for six minutes. Ceiling panels on the seventh floor came down. The structure did not move.
