Back Number Unrequited Love Songs: Popular Song Ranking [2026]

Until the day I can no longer rememberback number11rank/position

back number – Until the Day It Becomes Unrememberable (Short ver.)

For those who can’t stop thinking about an ex, the song you should listen to is “Omoidasenakunaru Sono Hi Made” (“Until the Day I Can No Longer Remember”).

It was released in 2011 by the rock band back number, known for their many love songs.

The track features a passionate band performance enriched with strings.

Many listeners will relate to the lyrics overflowing with feelings for a lover from whom they’ve grown apart.

It’s a unrequited-love song that portrays the ache in a heart that once shared both joy and sorrow as a pair.

Give this sentimental ballad about a wintertime parting a listen.

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I love youback number12rank/position

back number – I Love You

A poignant, heart-stirring song that tenderly expresses feelings for a loved one.

It’s a track by back number, released digitally in October 2022, and serves as the theme song for the NHK morning drama “Soar High!” Its gentle melody evokes a touch of nostalgia, wrapped in the warm tones of piano and strings.

The lyrics, which cherish the small moments of everyday life, leave a lasting impression.

It’s perfect to listen to while thinking of someone you love, or to enjoy together with someone important to you.

Old-fashionedback number13rank/position

back number – Old Fashion (full)

A gem of a love song that portrays love and loss that touch the heart.

Woven with delicate words about everyday exchanges with a loved one and unforgettable memories, this work reminds us of the importance of small joys in daily life.

Released in November 2018, it was chosen as the theme song for the TBS drama “A Story to Read When You First Fall in Love” (Dai Ren’ai: Boku o Wasureru Kimi to).

For back number, it was their first time providing a drama theme song in about three years, since 2015.

It’s a recommended track for those who cherish a special someone and wish to keep the memories with them close to their heart.

I like you, but it seems like you don’t really like me.back number14rank/position

Bokuwa Kiminokotoga Sukidakedo Kimiwa Bokuo Betsuni Sukijyanaimitai

This is a song by back number that candidly expresses the feelings of a bittersweet unrequited love.

The more the narrator thinks about the other person, the deeper they sink into it, singing of the pain of such a love.

You can really feel the ache of wanting to give up—saying “I’m not your type, am I?”—yet being unable to let go.

Released in December 2015, this track is recommended not only for those struggling with unrequited love, but also for anyone who wants to look back on a past romance.

Why not listen to this song and let the feelings you’ve kept tucked away in your heart be set free?

Happy Endingback number15rank/position

back number – Happy End (full)

This is a poignant song by back number that portrays a woman putting on a brave face at the moment of parting.

On the surface she tries to send him off with a smile, yet she cannot let go of her feelings for him, and the delicate depiction of her inner turmoil is deeply moving.

Written as the theme song for the film “My Tomorrow, Your Yesterday,” released in December 2016, it also drew attention for its music video featuring actress Erika Karata, and was later included on the album “Encore.” If you find yourself in a situation where you have no choice but to give up while still harboring feelings for someone you love, you may see yourself in this song.

It’s a soul-stirring track that will make you want to listen to it again and again through tears.

Winter and Springback number16rank/position

back number – Winter and Spring

This is a back number ballad about bittersweet love that you’ll want to listen to as the winter chill begins to ease.

Released as a digital single in January 2024, it was produced by Masanori Shimada, who also teamed up with the band on the hit “Suiheisen.” It also drew major attention for marking vocalist Iyori Shimizu’s first time directing a music video, with actress Anna Ishii appearing in it.

With total streams surpassing 100 million, the song has resonated with many listeners.

Its portrayal of relationships shifting with the seasons and emotions that overflow beyond words is sure to offer deep comfort during this time of graduations and farewells.

Why not take a moment to listen closely while reflecting on your cherished memories?