Karaoke Popular Song Ranking of back number [2026]

Supporting Actress Syndromeback number22rank/position

Jyoen Jyoyuushou

It’s a song that vividly portrays a hopeless love—one where the narrator, fully aware they’ll never be “the one,” continues a relationship in which they’re called on only when convenient.

Released as the B-side to back number’s 2012 single Aoi Haru and later included on the album blues, it depicts a protagonist who sarcastically acknowledges settling for an ambiguous relationship yet can’t stop the feelings that grow with every time they sleep together.

The fear that putting it into words would break everything keeps them swallowing the decisive confession, a detail that feels painfully real.

The groovy sound—highlighted by what Iyori Shimizu has called the standout bass line before the second chorus—is another draw, and the song became so beloved by fans that it even spawned a sequel, Supporting Actress Syndrome 2.

apple pieback number23rank/position

Apple Pie

Apple Pie, included on their 11th single Heroine.

It’s a refreshing, guitar-riff-driven number said to have been arranged from a song that had existed for five years before being released as a B-side.

The cute, familiar melody doesn’t span a wide vocal range, making it perfect for those who want to try singing a back number song but aren’t very confident at karaoke.

However, be careful not to go off pitch, as there are many falsetto parts throughout.

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Hoshino Takashi

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Size of the kaijuback number24rank/position

back number – The Size of the Monster

Back Number’s “Kaijū no Size” is a song that really shines for male singers at karaoke.

Its emotionally charged lyrics resonate with listeners.

The key is on the higher side, but with proper adjustment it becomes easier to sing, making it approachable even for beginners.

Also, switching between falsetto and chest voice is great practice for improving your vocal skills, and if you ride the uptempo beat and sing it out, you’re sure to grab attention at karaoke.

Seize the chance to show off the results of your hard practice with this song.

Bubbles and Sheepback number25rank/position

Awato Hitsuji

This heartwarming song portrays a protagonist who, after repeated failures in love and everyday life, gradually learns to accept themselves as they are.

Shifting from serious lyrics to a fresh, spring-like melody and the warm tones characteristic of back number, it gently conveys an uplifting message.

Released on the May 2015 single “SISTER” and included on the December 2015 album “Chandelier,” the track also became well-known as the tie-in song for the men’s shampoo “SUNSTAR TONIC.” With its relatable message and comfortable vocal range, it’s an easy choice to try at karaoke.

Blue amberback number26rank/position

back number – Blue Amber [Theme song for the Kansai TV/Fuji TV Monday 10 p.m. drama 'From the Day I Took You']

There are actually many people who say, “I want to sing back number songs because there are so many good ones, but they’re too high for me…” In that case, how about “Blue Amber,” released in 2025? It’s not an upbeat song, but if you like back number, you’ll surely be drawn to its emotional vibe.

The overall vocal range is C3 to B4, which is quite narrow for back number.

That said, there are a lot of switches between chest voice and falsetto.

You don’t need to imitate the singing style perfectly—just focus on which voice feels the best for you to sing with!

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Kubota Mami

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blinkback number27rank/position

back number – Mabataki (full)

The 17th single “Mabataki,” chosen as the theme song for the film “The 8-Year Engagement,” carries a love-filled message that resonates with the movie’s story and is sure to move you.

Its friendly, shuffle-beat melody makes it easy to remember, and since the overall vocal range isn’t wide, it’s easy to sing.

However, if you’re not comfortable with the bouncy rhythm, be sure to listen closely to the karaoke track as you sing.

Although the range is narrow, the key is relatively high, so if it feels difficult, consider trying it in a key that suits your voice.

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Hoshino Takashi

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Emeraldback number28rank/position

back number – Emerald

It’s a digital-only single released on October 12, 2020, and it’s the theme song for the drama “Dangerous Venus.” “Emerald” emphasizes expressive power, blending delicate romantic feelings with a dark elegance.

It’s recommended for men who want to refine their control of range, emotion, and rhythm.

Another key point is how beautifully you can sing the ad-libs when the melody shifts.

The vocal range is D#3 to B4, which feels relatively restrained for back number.

It’s tough to sing unless you can switch smoothly from chest voice to falsetto, and since the key modulates upward in the last chorus, you’ll likely project better if you use more breath and sing with raw emotion.

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Kubota Mami

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