"Lonely Hearts" is a song by Japanese singer-songwriter Miliyah Kato from her seventh studio album, Loveland (2014).

[3][4] "Lonely Hearts" has been certified gold by the Recording Industry Association of Japan with more than 100,000 units downloaded.

[11] In February 2020, "Lonely Hearts" was certified gold by the Recording Industry Association of Japan with more than 100,000 units downloaded.

[13] The third remix by the Sknow was released on 4 September 2019 as the B-side track of Kato's single, "Honto no Boku wo Shitte".

[14] "Lonely Hearts" was covered by Japanese singer Harucha for Kato's tribute album, Inspire (2020).