There is more than one artist with this name:
1) Mirai is a pop group from Frýdek-Místek, Czech republic.
Established 2014 by Mirai Navrátil and Šimon Bílý.
First EP "Cesta z města" was released 2015, first album "Konnichiwa" 2017.
Band members (12/2018):
Mirai Navrátil - vocals, guitar
Michal Stulík - solo guitar
Tomáš Javůrek - bass
Šimon Bílý - drums
2) Mirai (未来) was a Singaporean jpop girl trio comprising 陈毓秀 (Liz)