furthered their commercial momentum with another batch of rock anthems and popular concert standards. From November 1987 through February 1989, Princess Princess made 100 concert appearances, progressing from small clubs to regional public halls. In April 1988 the band accomplished the first goal they had as a group: playing the Shibuya Public Hall. Tickets sold out within two hours, causing their manager Ichimura to cry in her office; the band reportedly initially thought Ichimura was reacting to bad news until being informed of their sell-out. This period of increasing success culminated in their January 1989 shows at the Nippon Budokan, where Princess Princess became the first all-female group to play that important Tokyo venue. 1989 brought the band to the peak of their popular success. In April, their seventh single "Diamonds" was released, which reached No. 1 on the Oricon chart; the single also became the first CD single to become a "million seller" in Japan. In July, "Sekai de Ichiban Atsui Natsu" was re-released, and it also went to No. 1, earning Princess Princess the two top spots of the yearly sales rankings. The group made their first nationwide concert tour that summer, and finished out the year by releasing their fourth album, Lovers, which did not feature any single, but reached the No. 1 sales position in the albums chart. In 1990, the band consolidated their media presence with another nationwide tour, playing 56 venues, including major sports arenas. Their ninth single "Oh Yeah!" was released exactly a year after "Diamonds" and also reached No. 1. The band again finished the year releasing another album, the self-titled Princess Princess, and the single "Julian", also a No. 1 single. The following year saw Princess Princess continue their string of No. 1 singles with their 11th single, "Kiss", released in May, which would prove to be the band's last chart-topping song. Their next single "Seven Years After" peaked only at No. 3; the band's single sales into the 1990s never approached the heights of their 1989 period. In December 1991 the band released their 6th album, Dolls in Action. 1992 saw the band reduce their musical output, only releasing one new single, "Pilot-ni Naritakute" ("Wanting to Become a Pilot") and their first compilation album Singles 1987-1992. They ended the year with the 'double-A single' "Power"/"Regret" from their 7th studio album Bee-Beep. Bee-Beep was released in January 1993 and was to