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新宿住友ビル三角広場

新宿区西新宿2丁目6−1

Infobox

Capacity

最大2,000人

Official Site

https://office-b.sumitomo-rd.co.jp/sankakuhiroba/

Eventernote

https://www.eventernote.com/places/12716

Sora-bot edited on Feb 28, 2026, 11:05 PM

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