He hit upon the idea of building with foam in Japan when he noticed fast-food containers in a Tokyo alley and began to think about its uses .
Tokyo /location/administrative_division/country Japan
Japan /location/location/contains Tokyo
Japan /location/country/administrative_divisions Tokyo
Japan /location/country/capital Tokyo
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Japan
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/location/administrative_division/country
Japan
LOCATION
Tokyo
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Japan
LOCATION
Tokyo
LOCATION
/location/country/administrative_divisions
Japan
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Tokyo
LOCATION
/location/country/capital