"Summertime Blues"was released in May 1990 as her 16th single and peaked at No. 2 on the Oricon weeklies. It was included in her 6th album, "tokyo" a couple of months later. "tokyo"itself hit the top spot on the album charts a week after its release. The song was the first one that Watanabe composed and wrote.
A bit of Watanabe trivia. She is currently tied with Seiko Matsuda（松田聖子）, Akina Nakamori（中森明菜）, and rock band B'z at No. 3 for having No. 1 albums annually (8 years in a row). No. 2 belongs to Ayumi Hamasaki（浜崎あゆみ） at 12 consecutive years and No. 1 goes to Yumi Matsutoya（松任谷由実） at 18 years.