Arata Isozaki, Prolific Japanese Architect, Dies at 91

Mr. Isozaki finally built the museum as a village of platonic solids clad in a richly textured red Indian sandstone, with large pyramidal skylights illuminating the serene galleries below. The first gallery — voluminous, glowing, visually still — introduced the Japanese concept of ma, sometimes described as an emptiness full of possibilities, into a Western ensemble of forms straight from the geometry book. “That gallery was worth the whole building,” Mr. Gehry said at its opening.

The project pivoted Mr. Isozaki into a four-decade-long international career, which he pursued . . .