Former AKB48 leader Atsuko Maeda, 22, who graduated from the group last summer, made a special appearance at the group's concert at Sapporo Dome on Wednesday night.
The mega-popular group is currently on a five-dome concert tour of Japan.
Maeda sang three songs and chatted with current members Minami Takahashi, 22, Tomomi Itano, 22, Haruna Kojima, 25, and Minami Minegishi, 20, Sports Nippon reported, adding that the 30,000 fans were thrilled to see Maeda's first comeback since her graduation.
Also, AKB sub-group HKT 48, which was formed on July 20 at Fukuoka YafuOku Dome, was officially introduced at the concert. The seven members of the unit performed for the first time after 10 days of intense training.
"Like a rainbow, each of us wants to express a unique color," said HKT member Meru Tajima, 13.© Japan Today