According to the article, Kago Ai’s friend Naomi revealed that she’s been taking dance and vocal lessons 2 months ago, to prepare for a comeback.
Kago Ai also updated her blog with “I’ve gone through years of blanks so i’m honestly feeling uneasy. I want to achieve lots of things from now!”.
Kago Ai graduated from Morning Musume back in 2004. She was embroiled in a string of unfortunate incidents including underage smoking and failed suicide attempts thereafter. She got pregnant out of wedlock in 2011, married in the same year, and gave birth to a daughter in June 2012. She announced her return to the music industry on 15th August.
Her agency only has her as their artiste currently and is said to be looking out for other idols/talents.