By Rocky Swift and Elaine Lies TOKYO (Reuters) – Two years after Japan locked down its borders to block the coronavirus, some 150,000 foreign students still aren’t able to enter the country, left in limbo by a policy that has disrupted lives and caused headaches for universities and businesses. The absence of the foreign students and researchers is being felt from big laboratories to small, private universities, highlighting the importance of overseas talent – and their tuition fees – as Japan grapples with a shrinking population. While the policy to stop the virus has proved popular for Prime…

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