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 the 11th single “Heroine.” It’s a refreshing, guitar-riff-driven number said to have been arranged from a song that had existed five years before its release as a B-side.

With its cute, approachable melody and relatively narrow vocal range, it’s perfect even for those who want to try singing a back number song but aren’t very confident at karaoke.

Just be careful not to go off pitch, as there are many falsetto parts along the way.

expand_lessRaise the rankingexpand_morelower

Hoshino Takashi

Report a problem

Bubbles and Sheepback number24rank/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 number25rank/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!

expand_lessRaise the rankingexpand_morelower

Kubota Mami

Report a problem

Size of the kaijuback number26rank/position

back number – The Size of the Monster

From the intro, it has a rushing sense of exhilaration and is a classic back number-style heartbreak song.

It’s a poppy breakup/unrequited-love track produced by Takeshi Kobayashi.

It portrays the inner conflict of failing to convey your feelings—using the metaphor of a “kaiju’s size”—in the painful situation where the person you like already has a partner.

The overall vocal range is relatively calm at A#2–A#4, but it jumps up to a higher register at the start of the bridge.

Also, since the chorus sits in a higher range toward the latter half, the key is to really belt it out.

expand_lessRaise the rankingexpand_morelower

Kubota Mami

Report a problem

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 aligns with the movie’s story and is sure to move your heart.

Set to a shuffle beat with a friendly, memorable melody, it’s easy to learn, and since the overall vocal range isn’t wide, it’s also easy to sing.

However, if bouncy rhythms are not your strength, be sure to listen closely to the karaoke track when singing.

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

expand_lessRaise the rankingexpand_morelower

Hoshino Takashi

Report a problem

phantom thiefback number28rank/position

back number – Phantom Thief

This is a digital-only single by back number, released on May 24, 2021.

It was selected as the theme song for NTV’s Wednesday drama “Koi wa Deep ni.” While many recent songs feature complex rhythms and melodies, this track has a very easy-to-groove tempo, and the vocal melody is smooth and, I believe, quite easy to sing.

However, in the high notes of the chorus, the vocalist skillfully switches between chest voice and falsetto, so if you’re not confident in smoothly transitioning your vocal registers, you may want to pay a bit of attention to key settings and such.

Conversely, it’s also ideal as a practice piece for register transitions, so with that in mind, I encourage you to give it a try!

expand_lessRaise the rankingexpand_morelower

Kei Takahata

Report a problem