How many main islands are there in Japan?
4
3
3
3
3
5
3
5
3
4
5
3
4
5
3
4
5
3
4
5
2
3
4
5
2
3
4
5
6
2
3
4
5
6
2
3
4
5
6
2
3
4
5
6
2
7
3
4
5
6
2
7
3
4
5
6
2
7
3
4
5
1
6
2
7
3
4
5
1
6
2
7
3
4
5
1
6
2
7
3
4
5
1
8
6
2
7
4
5
1
8
6
2
7
4
5
1
8
6
2
9
7
4
5
1
8
6
2
9
7
11
4
1
8
6
2
9
10
7
11
4
1
8
6
2
9
10
7
11
1
8
6
2
9
10
7
11
12
1
8
6
2
9
10
7
11
12
1
8
6
2
9
10
7
11
12
1
8
6
9
10
7
11
12
1
8
6
9
10
7
13
11
12
1
8
9
10
7
13
11
12
1
8
0
9
10
7
13
144
66
132
0
62
127
144
66
132
0
62
169
127