In the coming weeks, girl group Rainbow will be officially beginning debut promotions for their first Japanese single, "A". Rainbow departed for Tokyo on September 3rd, where they will be completing their final, last minute preparations before the official release of "A" on September 14th.  A total of 20 mega electronic display boards and billboards advertising Rainbow's upcoming album have already been installed on the busiest streets of Shibuya, Tokyo. Around 50 fans were present at the Haneda Airport to welcome the girls' arrival.  Many fans even following them throughout the night as they headed out to restaurant for dinner and their hotel rooms. Rainbow has already been garnering hot interest for their music even before their official debut. Rainbow's "A" reportedly placed #1 on Japan's biggest online ringtone chart, Rekochoku, on August 31st, the same day of the ringtone's release. From September 4th onwards, Rainbow will be taking part in various media interviews, broadcast appearances and album release events as part of their vigorous Japanese promotion schedule. Source: Money Today Star News via Naver