B'z still the biggest selling artist in Japan.

Hard-rockers, B'z renewed their single records with "Sayonara Kizudarake no Hibi yo". The single is now their 44th no.1 single (second place goes to Hamasaki Ayumi with 37 no.1 singles). They also hold the record for the most consecutive no.1 (not including since debut) with 44 singles, with KinKi Kids in second place (30 consecutive no.1 singles). With this single as well, B'z extend their streak of most total sales from singles with 34,993,000 copies.

Source: whited_79 & oricon charts