| 1981 | November: Reverend Sun Myung Moon proposes the International Highway Initiative (10th ICUS, Seoul, Korea) |
|---|---|
| 1982 | AprilInternational Highway Construction Corporation established (Chairman: Osami Kuboki)
June: First surface exploration begins (northern Kyushu, Iki, southern Tsushima) October: Drilling begins on land at Higashimatsuura Peninsula (Yobuko Town, 500m). |
| 1983 | MarchLaunching of the Second Teiyan Maru (10 tons)
May : Japan-Korea Tunnel Research Association inaugural meeting (Chairman: Yasuo Sasa) July : The Japan-Korea Tunnel Research Association Kyushu Branch Founding General Meeting (branch chief: Genki Takada) August : Second sonic survey begins for the Japan-Korea Tunnel sea area September: Start of onshore electrical surveys and simple seismic surveys (Chinzei Town, Saga Prefecture) October : Environmental surveys begin in the sea area where the Japan-Korea Tunnel is planned to be constructed. November: Purchase of a research aircraft (6-seater Cessna) December: Gravity survey on land begins (Southern Tsushima) |
| 1984 | AprilThird sonic survey begins for the Japan-Korea Tunnel sea area (east offshore Iki)
May : Fourth sonic survey begins for the Japan-Korea Tunnel sea area (Tsushima, northwestern sea area) June: Start of land drilling in Iki (near Sumiyoshi Shrine, 400m) July: Start of land drilling in Tsushima (Koura, 70m) August : Magnetic survey begins in the sea area of the Japan-Korea Tunnel (Iki Channel) September: Start of Tsushima Land Bowling (Gozaki, 500m) October: Second surface exploration begins (northern Tsushima); December: Start of land boring in Tsushima (Himi River, 400m) |
| 1985 | JanuaryIki land drilling begins (Chojabaru, 400m)
March: Installation of microearthquake detectors (Tsushima) April: Start of land drilling in Iki (Tsutsuki, 400m) Start of land boring in Tsushima (Tsutsunaiin, 630m) July: Start of Iki Land Bowling (Kuki, 500m) August : First dressing begins for the Japan-Korea Tunnel sea area October: Start of Iki Land Drilling (Ide Yoshitoshi, 423m) |
| 1986 | JanuaryIki land drilling begins (Shinjo Nishi-futoshi, 400m)
February: Start of land drilling in Tsushima (Kuda River, 500m) March: Environmental survey begins in Aso Bay (Tsushima). April: Start of land drilling on the Higashimatsuura Peninsula (Chinzei Town, Saga Prefecture, 200m) Offshore drilling begins (western Tsushima, 500m) July : Second dressing begins for the Japan-Korea Tunnel sea area August: First Nagoyaura Environmental Survey begins (Yobuko Town, Saga Prefecture) Tsushima land boring begins (Minemachi, 400m) September: Start of diagonal boring at Kato Island (320m) Beginning of sea crossing survey (27km between Iki and Higashimatsuura Peninsula) October ceremony for the Japan-Korea Tunnel Investigation Incline (Chinzei Town, Saga Prefecture). |
| 1987 | JanuaryStart of land drilling on the Higashimatsuura Peninsula (Genkaicho, Saga Prefecture, 202m)
February: The second Nagoyaura Environmental Survey begins (Yobuko Town, Saga Prefecture). April: Nagoya Meteorological Observatory established (Chinzei Town, Saga Prefecture) Start of drilling on land at Higashimatsuura Peninsula (Ogawamachi, Saga Prefecture, 460m) May : The fifth sonic survey begins in the area where the Japan-Korea tunnel is expected to be built (in the northwestern sea area of Tsushima). Iki land drilling begins (Ashibecho, 500m) August: Fisheries survey begins (Asahi Bay, Tsushima) November: Start of oblique boring (inside the Japan-Korea tunnel investigation inclined shaft, 423m) |
| 1988 | AprilStart of drilling on land at Higashimatsuura Peninsula (Chinzei Town, Saga Prefecture, 130m)
May: Start of drilling on land at Higashimatsuura Peninsula (Saga Prefecture, Chinzei Town, 150m) July: First visit to China by a delegation from the International Highway Construction Corporation Start of second phase construction of Japan-Korea tunnel survey inclined shaft (Chinzei Town, Saga Prefecture) September: Fisheries survey begins (Asahi Bay, Tsushima) October: Groundbreaking ceremony for geological survey on Geoje Island, South Korea (Sangeori, Geoje County) Start of land drilling in Korea (Samgeori, Geoje County, 400m) November: Start of land boring in Korea (Myeongdong-ri, Geoje-gun, 300m) December: Start of land drilling in Korea (Dadaeri, Geoje County, 400m) Start of land drilling in Korea (Buchun-ri, Geoje-gun, 332m) |
| 1989 | MaySecond visit to China by the International Highway Construction Corporation delegation (Beijing - Shenyang - Dandong)
July : Groundbreaking ceremony for the Japan-Korea Tunnel Tsushima Survey Incline Shaft (Izuhara Town) Start of diagonal boring in the same tunnel (inclined tunnel entrance, 200m) September : Japan-Korea-China-Tokyo International Conference (co-hosted by ISC and IHCC) November: Japan-Korea Joint Reporting Session on the Japan-Korea Tunnel (Seoul, Korea) |
| 1990 | AprilThe International Highway Project was announced at the 11th World Congress of Public Opinion (Moscow)
July: Second visit to China by the International Highway Construction Corporation delegation August : Start of inclined shaft and diagonal boring survey for the Japan-Korea Tunnel (Chinzei Town, Saga Prefecture) |
10th ICUS (Korea)
First surface survey
Land bowling
10th ICUS (Korea)
First surface survey
Land bowling
*The period from the 1990s to the early 2000s was considered a time to attempt a more specific project approach from a general and comprehensive perspective based on previous research materials, and we have been working hard on various publicity and educational activities both domestically and internationally. Based on these results, we are currently formulating our second business plan while continuing to study further.
Since its proposal in 1981, this project has been carried out under the direction and supervision of the International Highway Construction Corporation, but as of January 2009, the project has been taken over by the new International Highway Foundation, a general incorporated foundation.
