Conversation so far:
When did the Japanese boy band SMAP make their debut?
1991
Was the boy band SMAP's debut successful?
SMAP took the Japanese entertainment industry by storm, becoming the most successful boy band in Japanese history and the bestselling band in Asia.
Was the band SMAP's debut part of a tour?
On January 1, 1991, SMAP held their first concert in Nippon Budokan and their first tour from March through April.
What cities did the band SMAP go to as part of their first tour?

Question: What album were they promoting on the tour?
Self-contained rewrite: What album were the band SMAP promoting on their first tour?