TOKYO -- For years, Japanese tax regulators have been grappling with a mystery that has also become their biggest headache: Why does SoftBank Group -- which became Japan's most profitable company last year -- pay so little tax?
Nikkei research found that SoftBank Group, once Japan's most profitable company, faced corporate income tax four times over the last 15 years. © Illustration by Chuan Ming Ong
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The mystery of SoftBank's zero tax bill
Nikkei investigation reveals years of huge profits and no taxes for Japan's top tech investor
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