MMIJ 2026, Fukuoka
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Session Details

General Session

(General session) Mining and underground construction machineries / Resource based economy and social system / Mining technologies

Thu. Sep 10, 2026 9:00 AM - 12:00 PM JST
Thu. Sep 10, 2026 12:00 AM - 3:00 AM UTC
Room-1(Building A, 1st Floor, A11)
Chairperson: 岡本信行（深海資源開発㈱）、坂口清敏（東北大学）
9:00 AM - 9:20 AM JST(12:00 AM - 12:20 AM UTC)

[3101]Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules by Air-Lift Pump around Minamitorishima Island - Degradation of Polymetallic Nodules during Transport -

○Yoshiyuki Shimizu1,2,3, Masatoshi Sugihara3, Yutaro Takaya2, Koichiro Fujinaga4,2, Kentaro Nakamura2,4, Yasuhiro Kato2,4 (1. ShimizuLab, Itasca JAPAN, 2. The University of Tokyo, 3. Former Tokai University, 4. ORCeNG, Chiba Institute of Technology)
Chairperson: 岡本信行（深海資源開発㈱）
9:20 AM - 9:40 AM JST(12:20 AM - 12:40 AM UTC)

[3102]Hybrid Mining of Rare-Earth Elements-Rich Mud and Polymetallic Nodules by Air-Lift Pump around Minamitorishima Island - Drag Coefficient of Polymetallic Nodules -

○Yoshiyuki Shimizu1,2,3, Masatoshi Sugihara3, Koichiro Fujinaga4,2, Kentaro Nakamura2,4, Yasuhiro Kato2,4 (1. ShimizuLab, Itasca JAPAN, 2. The University of Tokyo, 3. Former Tokai University, 4. ORCeNG, Chiba Institute of Technology)
Chairperson: 岡本信行（深海資源開発㈱）
9:40 AM - 10:00 AM JST(12:40 AM - 1:00 AM UTC)

[3103]Evaluation of Optimal Investment Timing in Manganese Nodule Development Considering Geological and Price Uncertainties

○Eikan Sunaoshi1, Tsuyoshi Adachi1, Narihiro Owada1 (1. Akita University)
Chairperson: 岡本信行（深海資源開発㈱）
10:00 AM - 10:20 AM JST(1:00 AM - 1:20 AM UTC)

[3104]The Third Stage of Rare Metal Value
— An Approach to Resource Value Assessment through Quantity, Quality, and Confidence —

○Kohmei Halada1 (1. Sustainable design institute)
Chairperson: 岡本信行（深海資源開発㈱）
10:20 AM - 10:40 AM JST(1:20 AM - 1:40 AM UTC)

[break]Break

10:40 AM - 11:00 AM JST(1:40 AM - 2:00 AM UTC)

[3105]Activities for the exploitation of polymetallic nodule

○Keisuke Nishi1, Nobuyuki Okamoto1 (1. Deep Ocean Resources Development Co., Ltd.)
Chairperson: 坂口清敏（東北大学）
11:00 AM - 11:20 AM JST(2:00 AM - 2:20 AM UTC)

[3106]Current Status of Polymetallic Nodule Mining Technology Development and Preparations for the Commercial Scale System Integration Test

○Akira Koizumi1, Nobuyuki Okamoto1 (1. Deep Ocean Resources Development Co.,Ltd.)
Chairperson: 坂口清敏（東北大学）
11:20 AM - 11:40 AM JST(2:20 AM - 2:40 AM UTC)

[3107]Numerical Experimental Study on the Effect of Bonding-Type Hydrates on the Elastic Propagation Characteristics of Soil

○Yuki Nishigaki1, Junich Takekawa1 (1. Kyoto university)
Chairperson: 坂口清敏（東北大学）
11:40 AM - 12:00 PM JST(2:40 AM - 3:00 AM UTC)

[3108]Wettability Changes in Carbonate Reservoirs during CO2-EOR: Influence of Acid Number in NaCl Solutions

○Kadoya Haru1, Elakneswaran Yogarajah1, Amir Ubaidah1 (1. Hokkaido University)
Chairperson: 坂口清敏（東北大学）
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