Announcement stated that hiatus will be mid- to long-term

The official website for singer Eir Aoi announced on Thursday that the singer will go on a mid- to long-term hiatus due to her treatment and subsequent recovery for an ongoing health issue that began at the start of the year. All of her planned events from January to February have been canceled.
The singer previously went on hiatus in November 2016 after her 5th Anniversary Special Live 2016 concert, only returning nearly two years later in spring 2018. She had announced in August 2016 that due to her poor health, she would be halting her current activities. At the time she cancelled several appearances in August, and one in January 2017.
Aoi launched her musical career in 2011. She released her first single, “Memoria,” in October 2011, with the single’s title song serving as the ending theme song to the