Region
Japan --
52
Japan
21
United States --
4
European Economic Community countries --
3
Asia
2
Asia --
2
Asia, Southeastern
2
Asia, Southeastern --
2
East Asia
2
Korea (South) --
2
Malaysia
2
United States
2
East Asia --
1
Korea (South)
1
Malaysia --
1
Pacific Area
1
Pacific Area --
1
Southeast Asia
1
Taiwan
1
Taiwan --
1