Makoto OTSUBO's Homepage

1. Otsubo, M., Miyakawa, A. (in press) Anisotropic Permeability Pathways Controlled by Intraslab Stress Heterogeneity in the Philippine Sea Slab Beneath the Ryukyu Arc. Geochemistry, Geophysics, Geosystems.
   
2. Hosono, H., Asahina, D., Otsubo, M., Kitagawa, Y., Matsumoto, N. (2026) Review on evaluations of anisotropic hydraulic properties in the fractured rock mass. Progress in Earth and Planetary Science, 13:24. (open access)
   
3. Otsubo, M., Amezawa, Y. (2026) Stress-driven faulting with weak overpressure in the Tokara Islands, Ryukyu Arc: implications for fault reactivation under backarc extension. Earth, Planets and Space, 78:18. (open access)
   
4. Koge, H., ...Otsubo, M. (2025) Inception of ridge-ridge-ridge triple junctions: Morphostructural analysis and dynamics in the early back-arc extension of the northern Okinawa Trough. Geology, https://doi .org /10 .1130 /G52640 .1
   
5. Tsukamoto, S., Guralnik, B., Prince, E., Oohashi, K., Otsubo, M. (2024) Recurrent partial resetting of quartz OSL signal by earthquakes: a thermochronological study on fault gouges from the Atotsugawa Fault, Japan. Earth, Planets and Space, 76: 117.
   
6. Toki, T., Yasumura, K., Takahata, N., Miyajima, Y., Miyaki, H., Oohashi, K., Otsubo, M. (2024) Origin of helium in basement rocks and carbonate veins in Yonaguni Island. GEOCHEMICAL JOURNAL, 58, 293-303.
   
7. Otsubo, M., Ogata, T. (2024) Neotectonics in Ryukyu arc—Future works on processes of uplift and subsidence—. Journal of the Geological Society of Japan, 130, 153-165.
   
8. Otsubo, M., Ujiie, K., Miyakawa, A. (2023) Estimating pore fluid pressure from geometrical characteristics of extensional mineral veins. Water-Rock Interaction WRI-17, OC6-05.
   
9. Watanabe, N., Arai, K., Otsubo, M., Toda, M., Tominaga, A., Chiyonobu, S., Sato, T., Ikeda, T., Takahashi, A., Ota, H., Iryu, Y., (2023) Geological history of the land area between Okinawa Jima and Miyako Jima of the Ryukyu Islands, Japan, and its phylogeographical significance for the terrestrial organisms of these and adjacent islands. Progress in Earth and Planetary Science, 10:10. (open access)
   
10. Amezawa, Y., Hiramatsu, Y., Miyakawa, A., Imanishi, K., Otsubo, M. (2023) Long‐Living Earthquake Swarm and Intermittent Seismicity in the Northeastern Tip of the Noto Peninsula, Japan. Geophysical Research Letters, 50, e2022GL102670. (open access)
    
11. Hosono, H., Takemura, T., Asahina, D., Otsubo, M. (2022) Estimation of paleo-permeability around a seismogenic fault based on permeability tensor from observable geometric information of quartz veins. Earth, Planets and Space, 74, 1-13. (open access)
    
12. Maeda, S., Toda,S., Matsuzawa, T., Otsubo, M., Matsumoto, T. (2021) Influence of crustal lithology and the thermal state on microseismicity in the Wakayama region, southern Honshu, Japan. Earth, Planets and Space 73, 1-10. (open access)
    
13. Miyakawa, A., Abe, T., Sumita, T., Otsubo, M. (2020) Half-graben inversion tectonics revealed by gravity modeling in the Mikawa Bay Region, Central Japan. Progress in Earth and Planetary Science, 7:63.
    
14. Oohashi, K., Otsubo, M., Matsumoto, H., Kobayashi, K., Sato, K., Nishimura, T. (2020) The Quaternary tectonics of central Kyushu and the 2016 Kumamoto earthquake: from a multifaceted viewpoint of geology, seismology, and geodesy. Journal of Geography. (in Japanese)
    
15. Maeda, S., Matsuzawa, T., Okada, T., Katao, H., Yoshida, T., Kosuge, M., Otsubo, M. (2020) Spatiotemporal variations in the stress field in the northeasternmost part of the NE Japan arc: constraints from microearthquakes. Earth, Planets and Space, 72:117. (open access)
    
16. Otsubo, M., Hardebeck, J., Miyakawa, A., Yamaguchi, A., Kimura, G. (2020) Localized fluid discharge by tensile cracking during the post-seismic period in subduction zones. Scientific Reports, 10:12281. (open access)
    
17. Otsubo, M., Katayama, I., Miyakawa, A., Sagiya, T. (2020) Inelastic behavior and mechanical strength of the shallow upper crust controlled by layer-parallel slip in the high-strain zone of the Niigata region, Japan. Earth, Planets and Space, 72:30. (open access)
    
18. Ogata, T., Otsubo, M., Ito, H. (2020) Geosites of Yonaguni Island Located at the Westernmost Point of Japan. E-journal GEO, 15, 44-54.
    
19. Tamura, T., Oohashi, K., Otsubo, M., Miyakawa, A., Niwa, K. (2020) Contribution to crustal strain accumulation of minor faults: a case study across the Niigata–Kobe Tectonic Zone, Japan. Earth, Planets and Space, 72:7. (open access)
    
20. Maeda, S., Otsubo, M., Asahina, D., Furuno, Y. (2019) Estimating the thickness of a faulted mechanical layer based on fault spacing: An example from Miyako-jima Island, southern Ryukyu Arc, Japan. Island Arc, e12336. https://doi.org/10.1111/iar.12336. (article)
    
21. Ogata, T., Otsubo, M. (2019) Geoscientific studies on the Quaternary faulting and geomorphic processes of the Ryukyu arc, southwestern Japan. The Quaternary Research (Daiyonki-Kenkyu), 58, 377-395. (in Japanese)
    
22. Sagiya, T., Otsubo, M. (2019) Crustal Strain Rate of the Japan Islands: Comprehensive Understanding of Geodetic and Geological/Geomorphological Data. Journal of Geography (Chigaku Zasshi), 128, 689-705. (in Japanese)
    
23. Otsubo, M., Miyakawa, A., Katayama, I., Okazaki, K. (2019) An inhomogeneous across-slab conduit controlled by intraslab stress heterogeneity in the Nankai subduction zone. Scientific Reports, 9, 994. doi:10.1038/s41598-018-38142-w. (open access)
    
24. Miyakawa, A., Kinoshita, M., Hamada, Y., Otsubo, M. (2019) Thermal-maturity structures in an accretionary wedge by a numerical simulation. Progress in Earth and Planetary Science, 6:8. (open access)
    
25. Otsubo, M., Naruse, H., Miyakawa, A. (2018) Temporal changes in the internal stresses and pore pressures in a large-scale submarine mass transport deposit. Progress in Earth and Planetary Science, 5:59. (open access)
    
26. Ujiie, K., Saishu, H., Fagereng, A., Nishiyama, N., Otsubo, M., Masuyama, H., Kagi, H. (2018) An explanation of episodic tremor and slow slip constrained by crack‐seal veins and viscous shear in subduction mélange. Geophysical Research Letters, 45. https://doi.org/10.1029/2018GL078374. (article)
    
27. Otsubo, M., Miyakawa, A., Imanishi, K. (2018) Normal-faulting stress state associated with low differential stress in an overriding plate in northeast Japan prior to the 2011 Mw 9.0 Tohoku earthquake. Earth, Planets and Space, 70:51. (open access)
    
28. Utsunomiya, M., Noda, A., Otsubo, M. (2018) Preferential formation of a slide plane in translational submarine landslide deposits in a Pleistocene forearc basin fill exposed in east-central Japan. The Geological Society Special Publications, 477, 23 March 2018, https://doi.org/10.1144/SP477.3.
    
29. Saishu, H., Okamoto, A., Otsubo, M. (2017) Silica precipitation potentially controls earthquake recurrence in seismogenic zones. Scientific Reports. 7: 13337. (open access)
    
30. Otsubo, M., Utsunomiya, M., Miyakawa, A. (2017) Reactivation of map-scale faults in response to changes in crustal stress: examples from Boso Peninsula, Japan. Quaternary International. 456, 117-124. (article)
    
31. Sato, K., Otsubo, M., Yamaji, A. (2017) Recent advancement and applications of stress tensor inversion techniques. Journal of the Geological Society of Japan. 123, 391-402. (in Japanese)
    
32. Kawasaki, R., Hamahashi, M., Hashimoto, Y., Otsubo, M., Kitamura, Y., Yamaguchi, A., Kameda, J., Hamada, Y., Fukuchi, R., Kimura, G. (2017) Temporal stress variations along a seismogenic megasplay fault in the subduction zone: an example from the Nobeoka Thrust, southwestern Japan. Island Arc, 26, e12193. (article)
    
33. Kitajima, H., Takahashi, M., Otsubo, M., Saffer, D., Kimura, G. (2017) Strength and deformation behavior of the Shimanto accretionary complex across the Nobeoka thrust. Island Arc, 26, e12192. (article)
    
34. Miyakawa, A., Otsubo, M., (2017) Evolution of crustal deformation in the northeast-central Japanese island arc: Insights from fault activity. Island Arc, 26, e12179. (open access)
    
35. Miyakawa, A., Sumita, T., Okubo, Y., Okuwaki, R., Otsubo, M., Uesawa, S., Yagi, Y., (2016) Volcanic magma reservoir imaged as a low-density body beneath Aso volcano that terminated the 2016 Kumamoto earthquake rupture. Earth, Planets and Space, 68, 208. (open access)
    
36. Shirahama, Y., Yoshimi, M., Awata, Y., Maruyama, T., Azuma, T., Miyashita, Y., Mori, H., Imanishi, K., Takeda, N., Ochi, T., Otsubo, M., Asahina, D., Miyakawa, A., (2016) Characteristics of the surface ruptures associated with the 2016 Kumamoto earthquake sequence, central Kyushu, Japan. Earth, Planets and Space, 68, 191. open access
    
37. Yagi, Y., Okuwaki, R., Enescu, B., Kasahara, A., Miyakawa, A., Otsubo, M. (2016) Rupture process of the 2016 Kumamoto earthquake in relation with the thermal structure around Aso volcano. Earth, Planets and Space, 68, 1-6. open access
    
38. Otsubo, M., Shimizu, T., Miyakawa, A., Sato, T., Ohwada, M., Kazahaya, K. (2016) Fractures in Cretaceous granite as pathways of upwelling deep-seated water at Kawachinagano city on Kii Peninsula, southwest Japan. Island Arc, 25, 298-300. (article)
    
39. Otsubo, M., Miyakawa, A., Kawasaki, R., Sato, K., Yamaguchi, A., Kimura, G. (2016) Variation of stress and pore fluid pressure using vein orientation along seismogenic megasplay fault - example of Nobeoka Thrust, southwestern Japan. Island Arc, 25, 421-432. (article)
    
40. Miyakwa, A., Yamada, Y., Otsubo, M. (2016) Stress changes in an accretionary wedge related to the displacement of an out-of-sequence thrusts in a numerical simulation. Island Arc, 25, 433-435. (article)
    
41. Otsubo, M., Miyakawa, A. (2016) Landward migration of active folding based on topographic development of folds along the eastern margin of the Japan Sea, northeast Japan. Quaternary International, 397, 563–572. open access (until Mar. 2017)
    
42. Miyakawa, A., Otsubo, M. (2015) Effect of a change in the state of stress on inland fault activity during the Mw 6.6 Iwaki earthquake resulting from the Mw 9.0 2011 Tohoku earthquake, Japan. Tectonophysics, 661, 112-120. (article)
    
43. Miyakawa, A., Otsubo, M. (2015) Applicability of slip tendency for understanding long-term fault activity: a case study of active faults in northeastern Japan. Journal of JSCE, 3, 105-114. (article)
    
44. Otsubo, M., Miyakawa, A., Tsukamoto, H., Yamamoto, T., Watanabe, Y. (2014) Uncertainty of faulting for long-term safety assessment in geological disposal. Journal of the Geological Society of Japan, 120, 423-433. (in Japanese) (article)
    
45. Shigematsu, N., Otsubo, M., Fujimoto, K., Tanaka, N. (2014) A method of orienting drill core samples. Journal of Structural Geology, 67, 293-299.
    
46. Otsubo, M., Shigematsu, N., Imanishi, K., Ando, R., Takahashi, M., Azuma, T. (2013) Temporal slip change based on curved slickenlines on fault scarps along Itozawa fault caused by 2011 Iwaki earthquake, northeast Japan. Tectonophysics, 608, 970-979. (article)
    
47. Otsubo, M., Miyashita, Y., Miyakawa, A., Miyawaki, M. (2013) Slickenlines on fault scarps along Yunodake Fault caused by an earthquake in Iwaki-city (Fukushima Prefecture, Japan) on April 11, 2011. Journal of the Geological Society of Japan 119, XIII-XIV.
    
48. Otsubo, M., Miyakawa, A., Kubo, A. (2013) Spatial stress heterogeneity imaging by using difference between reduced stress tensors detected from earthquake focal mechanisms. Proc. the 6th International Symposium on In-situ Rock Stress (RS2013), 1123-1128.
    
49. Toyoshima, T., Osanai, Y., Baba, S., Hokada, T., Nakano, N., Adachi, T., Otsubo, M., Ishikawa, M. (2013) Sinistral transpressional and extensional tectonics in Dronning Maud Land, East Antarctica, including the Sor Rondane Mountains. Precambrian Research, 234, 30-46.
    
50. Otsubo, M., Shigematsu, N., Takahashi, M., Azuma, T., Imanishi, K., Ando, R. (2012) Slickenlines on fault scarps caused by an earthquake in Iwaki-city (Fukushima Prefecture, Japan) on 11 April 2011. Journal of the Geological Society of Japan, 118, III-IV.
    
51. Naruse, H., Otsubo, M. (2011) Internal Stress Fields of a Large-Scale Submarine Debris Flow. Submarine Mass Movements and Their Consequences, 31, 607-617.
    
52. Otsubo, M., Yamaguchi, N., Kimura, N., Nomura, S., Naruse, H. (2011) Basal slip plane of the Kurotaki unconformity in the Boranohana area along the Pacific coast of the Boso Peninsula, Central Japan. Island Arc, 20, 305-307. (article)
    
53. Naruse, H., Otsubo, M. (2011) Heterogeneity of Internal Structures in a Mass-transport Deposit, Upper Cretaceous to Paleocene Akkeshi Formation, Hokkaido Island, Northern Japan. SEPM Special Publication, 96, 279-290.
    
54. Otsubo, M., Yamaji, A. (2010) Relationship between ground and crustal deformations in the western part of the Oginojo Anticline, synchronous with the 2007 Niigataken Chuetsu-oki Earthquake. Journal of the Geological Society of Japan, 116, 615-623. (in Japanese) (article)
    
55. Kobayashi, K., Otsubo, M., Kurita, Y. (2010) Stratigraphy and geological structure of the Niigata sedimentary basin, central Japan. Journal of the Geological Society of Japan, 116, XVII-XVIII. (in Japanese)
    
56. Otsubo, M., Shigematsu, N., Kitagawa, Y., Koizumi, N. (2009) Stress history in the forearc region of the Nankai trough subduction zone: paleostress analysis based on faults in core samples from the Kumano Ichiura and Kihoku Miyama sites, Kii Peninsula, SW Japan. Journal of the Geological Society of Japan, 115. 457-469. (in Japanese) (article)
    
57. Otsubo, M., Yamaji, A., Kubo, A. (2008) Determination of stresses from heterogeneous focal mechanism data: An adaptation of the multiple inverse method. Tectonophysics, 457, 150-160. (article)
    
58. Yamaji, A., Otsubo, M., Sato, K. (2008) Procedures of obtaining fault-slip data from borehole cores oriented by reference grooves or bedding attitudes. Journal of the Geological Society of Japan, 114, 250-255. (in Japanese)
    
59. Otsubo, M., Sato, K., Yamaji, A. (2006) Computerized identification of stress tensors determined from heterogeneous fault-slip data by combining the multiple inverse method and K-means clustering. Journal of Structural Geology, 28, 991-997. (article)
    
60. Yamaji, A., Otsubo, M., Sato, K. (2006) Paleostress analysis using the Hough transform for separating stresses from heterogeneous fault-slip data. Journal of Structural Geology, 28, 980-990.
    
61. Otsubo, M., Yamaji, A. (2006) Improved resolution of the multiple inverse method by eliminating erroneous solutions. Computers and Geosciences, 32, 1221-1227. (article)
    
62. Yamaji, A., Tomita, S., Otsubo, M. (2005) Bedding tilt test for paleostress analysis. Journal of Structural Geology, 27, 161-170.

2．International conference presentation
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