Since 2012 May, the Y arm tunnel of KAGRA was excavated from Mozumi area and Atotsu area. In Dec/5/2013, this Y arm tunnel finally became one tunnel.
The KAGRA Y arm tunnel has been opened !
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Special Promoted Research ｜ Strategic Fund for Strengthening Leading-edge R&D ｜ Gravitational Wave Project Office
KAGRA Public Relations Office ｜ Large Scale Academic Frontier Research Promotion