In February 1988, Kubota released the single "You Were Mine", which reached number 3 on the Oricon Singles chart. The single also sold over 100,000 units in Japan, reaching gold certification status. In September 1988, Kubota released his third album, "Such A Funky Thang!". The album reached number 1 on the Oricon Albums charts and sold over a million copies. The album spawned the single "Dance If You Want It", which charted at number 2 on the Oricon Singles chart. In May 1988, he released his video-DVD "Super Duper Vol. 1". In July 1988, he released his concert DVD "Keep On Dancing". In January 1989, the second single "Indigo Waltz", which featured American-singer Lynn Davis, was released. The album's third single, "High Roller", charted at number 11 on the Oricon Singles chart.