おニャン子クラブ
The first solo single of Iwai, whose nickname was "Yuuyu", was released by Canyon Records under the name of "Yuuyu with Onyanko Club" on 25 March. Three Onyanko Club members Ruriko Nagata, Mutsumi Yokota and Tomoko Fukawa were selected as backing vocals for the single. It debuted at number two on the single chart. On 28 March, the group's third nationwide concert tour entitled "Onyanko Sailing Yumekoujyou" began at Osaka-jo Hall in Osaka. They subsequently performed at arenas in Fukuoka, Nagoya and Tokyo. The whole tour drew a total of some 200,000 attendees.