A 15th generation stone mason was brought from Japan to construct the expansion's  Photo 4 of 8 in Take a Tour of Kengo Kuma’s Expansion of the Portland Japanese Garden

Take a Tour of Kengo Kuma’s Expansion of the Portland Japanese Garden

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A 15th-generation stone mason was brought from Japan to construct the expansion's 185-foot-long, 18.5-foot-high "castle wall." The Baker Blue granite stones sourced from Baker City, Oregon, were handpicked and hand-laid with a seismically-safe traditional technique. Interestingly, the artisan was very excited about this project as he had never actually built a new wall—in Japan, his work consists of repairing ancient structures.