TOKYO (Reuters) - Japan will tighten border controls for the southern African nations of Mozambique, Malawi and Zambia, requiring a 10-day quarantine for any entrants, the Foreign Ministry said on Saturday, after a new coronavirus variant was detected in South Africa.

       The new rules will take effect from midnight (1500 GMT on Saturday) and come a day after Japan tightened border controls for those arriving from South Africa, Botswana, Eswatini, Zimbabwe, Namibia and Lesotho.

       (Reporting by Elaine Lies; Editing by Simon Cameron-Moore)