As an architect, this was on my can't miss list. From the outside even the shape pulls you in. The space explodes upward from the second you enter. As you move through the space the whale-rib like structure becomes readily apparent. Knowing the complexity of structural design in this earthquake zone, this is a phenomenal design. Having known this space from it's once having been in Progressive Architecture, I had to see it. We simply do not have spaces like this in America. Be sure to take the elevator to the top level and walk around on the upper level. The ramps down and across the upper levels give you a great changing view of this vast multistory open atrium. Stand in one place and pan around to help you truly understand what and how the structure is resisting both gravity dead load and seismic loads as well. The huge cross tube in the middle must be necessary to contain lateral forces present in the tension of placing two convex systems in on each other sort of like a reverse buttress system as in cathedral walls of old. The forces here bear not hidden agenda, and all the members can be understood to be absolutely in synch with each other. A beautiful example of Japan's habit of focusing on rhythm and repetition as a design them. Well done. This is a definite don't miss space.