Fig. 6

Distribution map of bending-related normal faults. a Map of the entire Japan Trench. Areas within the black dashed rectangles are shown in panels b and c. b Enlarged map of the southern part of the Japan Trench. c Enlarged map of the central and northern parts of the Japan Trench. Red and blue triangles indicate eastward and westward dipping normal faults, respectively. Darker colors indicate larger fault throws. The background map is a gray-shaded bathymetric map. The yellow line indicates the base of the landward slope. The thin white lines are seismic lines, and the thick black lines indicate locations of the seismic profiles shown in Figs. 3, 4, 5. Magenta contours show the slip distribution during the Tohoku earthquake (from Iinuma et al. 2012), same as Fig. 1. Orange dashed lines with arrowheads indicate the three segments inferred in this study. The same figure with the red-relief image as the background map is shown in Additional file 3: Fig. S3