At the inauguration ceremony of the Indonesian Tunneling and Underground Construction Society (InaTUCS) held in Jakarta, Indonesia, on November 1, 2025, Dr. Yingyongrattanakul Narentorn, Deputy Director of Railway Division, and Mr. Daisuke Nanjo, Deputy General Manager of Railway Engineering Department 1, of Oriental Consultants Global Co., Ltd. (OC Global; Headquarters: Shinjuku-ku, Tokyo) spoke at the event.

Group photo of participants at the inauguration ceremony

The inauguration ceremony was attended by over 100 participants, including the President and members of International Tunnelling Association, PT Mass Rapid Transit Jakarta (PT MRTJ), and various organizations involved in tunnelling and underground construction, as well as contractors, consultants, and research institutions from both inside and outside of Indonesia.

Dr. Yingyongrattanakul and Mr. Nanjo explained about OC Global’s extensive experience and technical expertise in the field of railway tunneling, as well as new technology for tunnel subsidence monitoring utilizing SAR satellite data, which is being developed in collaboration with Synspective Inc. In addition, they presented a case of the subway tunnel collapse that occurred in Bangkok on September 24, 2025.

Right: Visakhadevi Sutandhi, Civil and Structure Section Chief, MRTJ Engineering
Left: Yingyongrattanakul Narentorn, Deputy Director, Railway Division, OC Global

Center: Weni Maulina, Construction Director, PT. MRTJ / President, InaTUCS
Left: Daisuke Nanjo, Deputy General Manager, Railway Engineering Department 1, OC Global
Right: Yingyongrattanakul Narentorn, Deputy Director, Railway Division, OC Global

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