Region
Japan --
Japan
23
East Asia
6
United States
5
United States --
5
Asia
4
Asia --
3
Asia, Southeastern
3
East Asia --
3
China --
2
Asia, Southeastern --
1
China
1
Developing countries
1
Europe
1
Europe --
1
Korea
1
Korea --
1
Singapore
1
Singapore --
1
Southeast Asia --
1
Western countries
1
Western countries --
1