Japan Telecom Top Companies
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Nippon Telegraph and Telephone Corporation
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KDDI Corporation
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SoftBank Group Corp.
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Rakuten Mobile, Inc
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Internet Initiative Japan, Inc.
*Disclaimer: Top companies sorted in no particular order
Japan Telecom Market Concentration
Japan Telecom Company List
Nippon Telegraph and Telephone Corporation
KDDI Corporation
SoftBank Group Corp.
Rakuten Mobile, Inc.
Internet Initiative Japan, Inc.
JSAT Corporation
TOKAI Communications Corporation
Wowow Inc.
Internet Initiative Japan, Inc.
Z Holdings Corporation
Specific to Japan Telecom Market