https://www.reuters.com/article/us-g7-economy-japan-facebook/japan-urges-g7-to-think-beyond-existing-rules-in-dealing-with-libra-idUSKCN1UC2RS >Japanese Finance Minister Taro Aso on Wednesday urged his G7 counterparts to make a comprehensive assessment of Facebook Inc's Libra digital currency for any fresh challenges that could be overlooked by existing regulations.