K-pop supergroup BTS clinched two top spots on Japan's Oricon music chart with its fifth studio album "ARIRANG" in the first half, data showed Thursday. The album topped both the album ranking chart, which compiles physical album sales, and the combined album ranking chart, which includes physical album sales, digital album downloads, as well as streamings, in the Dec. 8 to June 7 period, according to the data. "Arirang" ranked No. 3 on the digi…