Table 1. Locations of each of the investigated sections.

Section	Base of section	Top of section
Hiraiso Coast 1a	38°48′0.30″N, 141°32′45.89″E	38°48′1.09″N, 141°32′45.61″E
Hiraiso Coast 1b	38°48′0.27″N, 141°32′44.87″E	38°48′0.48″N, 141°32′44.65″E
Hiraiso Coast 2	38°47′49.61″N, 141°32′38.53″E	38°47′50.00″N, 141°32′36.55″E
Hiraiso Coast 3	38°47′49.20″N, 141°32′35.20″E	38°47′51.10″N, 141°32′33.57″E
Hiraiso Coast 4	38°47′51.35″N, 141°32′32.47″E	38°47′51.31″N, 141°32′26.57″E
Hiraiso Coast 5	38°47′51.63″N, 141°32’26.16″E	38°47′53.35″N, 141°32′25.26″E
Hiraiso Coast 6	38°47′53.61″N, 141°32′23.38″E	38°47′53.74″N, 141°32′22.59″E
Osawa Harbour	38°47′30.76″N, 141°31′43.46″E	NA
Kamiwarizaki	38°37′41.70″N, 141°31′40.92″E	38°37′41.74″N, 141°31′40.10″E