SEOUL/TOKYO -- South Korea's presidential frontrunner has softened his typically hardline stance on Japan, but concerns linger in Tokyo that warming ties could chill again under Seoul's next leader.
South Korea election
Japan wary of a possible Lee Jae-myung presidency in South Korea
Concerns persist despite leading candidate easing hardline stance on historical issues
South Korean presidential candidate Lee Jae-myung says Japan is "an important cooperative partner." (Nikkei montage/Source photos by Reuters and AP)
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