Table 1
Survey point information
Cruise no. / platform ID
Site name
Latitude
Longitude
Depth [m]
Distance
from shore
[km]
Date
Dive no.
Survey
area [km
2
]
Survey
length [m]
KK-13-1
1
Off Minamisanriku-cho
38.56540
141.95063
289
27.3
2013/6/30
CRM005
267
ROV ( Crambon
)
2
Off Kamaishi (canyon)
39.24870
142.21763
477
16.9
2013/7/1
CRM006
622
4
Off Otsuchi (canyon)
39.42470
142.25160
457
13.4
2013/7/2
CRM008
1,660
5
Yamada Bay
39.46550
141.99539
46
0.7
2013/7/3
CRM009
42
6
Yamada Bay
39.46580
141.99550
46
0.6
2013/7/3
CRM010
53
YK12_12
7
Bacterial mat site, trench
37.73170
143.28459
3,503
126.6
2012/7/31
YKDT147
3,056
Deep-tow (YKDT)
9
39 N site, Japan Trench
39.10900
143.88912
5,221
132.3
2012/8/2
YKDT148
3,002
10
Crack site, Japan Trench
38.19850
143.78230
5,665
147.5
2012/8/3
YKDT149
3,816
11
Animal site, Japan Trench 38.65600
143.57869
3,101
121.4
2012/8/4
YKDT150
2,808
12
Submarine canyon off
Miyako
39.43170
142.28046
551
11.1
2012/8/5
YKDT151
12,008
13
39 N site, Japan Trench
39.10420
143.89455
5,152
133.3
2012/8/7
YKDT152
1,596
MR12_E2
14
Off Oshika Peninsula
38.53640
141.97525
320
27.6
2012/3/16
DT-6C
8,618
Deep-tow (4KC)
15
Off Oshika Peninsula
38.52760
142.04983
440
32.7
2012/3/17
DT-7C
6,333
16
Off Sendai Bay
37.88120
142.31117
890
57.5
2012/3/18
DT-8C
3,830
17
Off Kesennuma
38.83690
142.06783
349
20.5
2012/3/19
DT-9C
1,080
18
Off Kamaishi (canyon)
39.24240
142.29475
727
19.5
2012/3/20
DT-10C
7,167
19
Off Kamaishi (canyon)
39.24390
142.24025
567
17.6
2012/3/20
DT-11C
2,257
Chartered ship
21
Off Iwate
39.36259
142.14869
240
7.2
2013/3/12–13
46.0
Side-scan sonar
22
Off Miyagi
38.95898
141.96978
190
9.8
2013/3/15–17
26.0
23
Off Miyagi
38.89315
141.88641
160
12.2
2013/3/15–17
12.0
Chartered ship
24
Hirota Bay
39.10483
141.82088
15
0.0
2012/7/31–8/2, 8/6–11, 9/3–8
1.5
Side-scan sonar
25
Okirai Bay
38.99597
141.64145
15
0.2
2012/7/26–30, 9/9–13
0.3
26
Tōni Bay
39.19732
141.87830
20
0.3
2012/7/23–25, 9/13–16
1.4
Depths in bold-type letters were our main study depths