Yuka Ōtsubo (大坪 由佳, Ōtsubo Yuka; born June 11, 1993) is a Japanese voice actress and singer from Chiba Prefecture affiliated with Early Wing. In 2014, she started her career as a singer by joining the band SmileY inc. with Vocaloid musician Yuuyu-P. She also did the voice of Vocaloid character Azuki Masaoka for V4.
Source: “Yuka Ōtsubo”, English Wikipedia (CC BY-SA 4.0), excerpt