Table 3.2 Distribution area of soil groups in Japan (%)
Great group
Hokkaido
Tohoku
Kantou
Tokai–
Hokuriku
Kinki–Chugoku–
Shikoku
Kyushu–
Okinawa
Whole
A
Human-made soils
<0.1
<0.1
<0.1
<0.1
<0.1
0.2
<0.1
A1
Artifactual soils
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
A2
Reformed soils
<0.1
<0.1
<0.1
<0.1
<0.1
0.2
<0.1
B
Organic soils
3.3
1.2
1.0
0.2
0.1
0.1
1.1
B1
Peat soils
3.3
1.2
1.0
0.2
0.1
0.1
1.1
C
Andosols
41.8
35.8
40.0
21.8
8.6
34.0
30.3
C1
Podzolic Andsols
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
<0.1
C2
Regosolic Andosols
7
3
4
0
<0.1
2
3
C3
Gleyed Andosols
<0.1
0
1
<0.1
<0.1
<0.1
0
C4
Wet Andosols
0
1
1
0
1
1
1
C5
Non-allophanic
Andosols
6
11
3
16
7
1
7
C6
Allophanic Andosols
28
20
30
5
1
31
19
D
Podzols
1.2
5.5
4.0
1.7
<0.1
<0.1
2.1
D1
Podzols
1.2
5.5
4.0
1.7
<0.1
<0.1
2.1
E
Fluvic soils
10.3
13.8
16.6
15.7
14.2
12.6
13.7
E1
Fluvic Paddy soils
0.2
0.1
0.3
4.0
2.1
4.1
1.5
E2
Gley Fluvic soils
1.4
6.6
8.0
7.7
3.3
2.7
4.7
E3
Gray Fluvic soils
2.6
6.0
6.0
2.7
6.3
4.0
4.7
E4
Brown Fluvic soils
5.3
0.8
1.9
0.6
1.3
0.5
2.0
E5
Regosolic Fluvic
soils
0.8
0.3
0.4
0.8
1.1
1.4
0.8
F
Red-Yellow soils
0.9
5.9
0.5
10.6
16.0
14.4
7.6
F1
Argic Red-Yellow
soils
<0.1
0.3
0.1
7.1
7.8
8.8
3.5
F2
Cambic Red-Yellow
soils
0.9
5.6
0.5
3.6
8.2
5.6
4.1
G
Stagnic soils
1.8
0.0
1.3
0.9
0.2
0.0
0.8
G1
Stagnogley soils
<0.1
<0.1
1.2
<0.1
<0.1
<0.1
0.2
G2
Pseudogley soils
1.8
<0.1
0.2
0.9
0.2
<0.1
0.6
H
Eutrosols
<0.1
<0.1
<0.1
0.2
0.0
1.1
0.1
H1
Magnesian Eutrosols
<0.1
<0.1
<0.1
0.1
<0.1
<0.1
<0.1
H2
Calcareous Eutrosols
<0.1
<0.1
<0.1
0.1
<0.1
1.1
0.1
I
Brown Forest soils
31.9
27.8
22.7
36.0
47.6
30.4
33.2
I1
Brown Forest soils
31.9
27.8
22.7
36.0
47.6
30.4
33.2
J
Regosols
8.1
6.1
6.0
7.5
7.9
4.4
6.9
J1
Volcanogenous
Regosols
4.9
0.5
0.6
0.4
<0.1
0.7
1.4
J2
Sandy Regosols
0.6
0.8
0.6
1.1
0.3
0.4
0.6
J3
Lithosols
0.9
2.7
1.7
0.7
0.7
0.3
1.2
J4
Terrestrial Regosols
1.8
2.1
3.1
5.3
6.9
3.0
3.7
Others
0.6
3.9
7.7
5.3
5.2
2.8
4.1
Z1
Rocks and stones
<0.1
2.1
2.7
0.8
0.5
0.4
1.1
Z3
City, Water
0.6
1.8
5.0
4.5
4.7
2.4
3.1
64
H. Shinjo and Y. Takata