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.

Question: What cities did they go to?
Self-contained rewrite: What cities did the band SMAP go to as part of their first tour?