#4 of the images Cold Season Exclusive: Explore Kannana Underground’s ‘Regulating Pond’ and Flood Protection Tunnel | FRIDAY DIGITAL

Classical chamber music concert. Enjoy the unique acoustics of the underground regulation ponds. (PHOTO: Provided by the Tokyo Metropolitan Government Construction Bureau).

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Cold Season Exclusive: Explore Kannana Underground’s ‘Regulating Pond’ and Flood Protection Tunnel

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