Finance chiefs of the Group of 20 major economies broadly shared the view that the world economy will pick up in the second half of this year before posting higher growth next year, a Japanese delegation source said Thursday.

But some G20 members cited the U.S.-China tariff war, high levels of debt incurred by China and other emerging countries, and a potentially disorderly exit by the United Kingdom from the European Union as risk factors for global growth, the source told reporters after the first day of a two-day meeting in Washington.

Finance Minister Taro Aso and Bank of Japan Gov. Haruhiko Kuroda led the meeting under Japan's first presidency of the group, which will culminate in a G20 summit hosted by Prime Minister Shinzo Abe in late June in Osaka.