Business Category : Environmental, medical and welfare
Created on 2016-3-3
Updated on 2016-3-3
Nippon Geophysical Prospecting Co., Ltd. (Ota City)
Nippon Geophysical Prospecting Co., Ltd. boasts a long history since its foundation in 1942. Having developed high-end detectors, it detects metals and hazardous objects left in the ground or water, as well as dealing with a wide variety of fields including boring, land surface investigations, land surveys and environmental researches. We interviewed President Masao Kato; the Company is highly praised both domestically and overseas as a comprehensive consulting firm involved in construction works.
We were founded as a company for geological surveys. Digging for constructing tunnels, dams and the likes, we need to identify bedrock faults, in particular soft parts of them. We started ahead of rivals the "elastic wave exploration," a method measuring solidness of bedrocks through recording and analyzing vibrations triggered by dynamite explosions. We started hazardous substance detections in mid-50s. Unexploded bombs by air attacks during the World War II are still left under the ground of Tokyo. They can be at as much as 7-8 meter depths where soil is soft, causing potential dangers of unfortunate explosions in case civil engineering and building structures were inadvertently built on them. To prevent these accidents, vertical magnetic surveys are conducted through boreholes.
Elsewhere, depending on each case, we conduct surveys from ground surfaces using metal detectors and, for oceans, horizontal magnetic surveys and diving explorations. The Company, having celebrated its 70th anniversary last year, has worked on more than 67,000 operations including detecting 80 or more bombs, mines and torpedoes and more than 66,000 cannon balls. Among our big works was the Suez Canal expansion works Egypt started about 40 years ago. In the bottom of the Canal were a lot of unexploded bombs and cannon balls left after the 4th Middle East War. The work had been involving a lot of difficulties as explosion accidents occurred frequently. We therefore joined the work with our marine magnetic technologies, detecting more than 2,000 bombs and other ordnance.
When the 2004 Chuetsu Earthquake broke out in Niigata Prefecture, There were such incidents that vehicles were buried in landslides. Following this, upon a request from the Ministry of Land, Infrastructure, Transport and Tourism of whether these vehicles can be identified in case of disasters, we experimented at a riverbed of Shizuoka Prefecture where sensors searched and successfully detected a vehicle buried for this purpose. Then, the Great East Japan Earthquake broke out and left many vehicles sunk in the Kitakami-gawa River unfortunately. We started searching them around June with sensor-equipped boats as water was muddy. We worked hard together although afterquakes frequently struck and made us uneasy at that time, just wishing to find as many vehicles as possible and return them to surviving families. We received a certificate of appreciation because of these efforts from Director of the Tohoku Regional Bureau of Ministry of Land, Infrastructure, Transport and Tourism in that July.
We think our office location close to Kasumigaseki is good as we frequently receive orders from nation’s various organizations. Other public institutions also give us businesses of soil investigations and ground surveys. We believe we are contributing to the society through these works.
Nippon Geophysical Prospecting Co., Ltd.
Address: 2-2-12, Nakamagome, Ota-ku, Tokyo