back number Popular Song Ranking [2026]

Size of the kaijuback number36rank/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.

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Kubota Mami

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apple pieback number37rank/position

Apple Pie

This is a song by back number that delicately portrays a couple’s feelings as their bittersweet memories of love slowly fade and they confront the monotony of everyday life.

Capturing the subtle distance and small pangs of loneliness between lovers with a beautiful melody, the track was included on the December 2015 album Chandelier.

As time passes, even physical affection decreases, and though they sense a crisis in a relationship that seems to be cooling, the song’s strikingly positive stance lies in finding new happiness in the ordinary—like sharing a slightly cold apple pie together.

It’s a must-listen for couples who feel they’re in a lull.

Setagaya Love Storyback number38rank/position

Setagaya Love Story

Who hasn’t felt their heart tighten with the frustration of words left unsaid on the walk to the station just before the last train? Sung by the rock band back number, this song is a medium-tempo ballad that vividly portrays the clumsy feelings of a man.

Within the brief time between leaving an izakaya and heading to the station, the protagonist’s hesitation and earnest longing—his inability to take that one extra step—are woven into everyday scenes.

Included as the closing track on the album “Love Story,” released in March 2014, it was later adapted into a short film in January 2015 by director Isao Yukisada, earning praise for its evocative world.

It’s a masterpiece I hope anyone struggling to find the right words at a parting with someone they love will listen to.

The Witch and Meback number39rank/position

Majyoto Boku

A track that portrays the frustrating feeling of being completely ensnared by someone’s charm and unable to break free.

It was included as the B-side to the single “Happy End,” released in November 2016.

While finding comfort in the gentle words they offer, you realize you’re not the only special one and quietly pretend not to notice…

Such piercing regret and self-loathing are depicted vividly within a slightly dark world.

For those who, burdened with truths they don’t want to know, can’t seem to leave the relationship no matter what, this song will surely offer deep solace.

On nights when you’re suffocated by the weight of their words, why not soak yourself to the fullest in back number’s heartrending vocals?

If I became your loverback number40rank/position

Kimino Koibitoni Nattara

“If I Became Your Lover,” included as the B-side to “Happy End,” is a pop song that portrays the bittersweetness and daydreams of unrequited love.

Written, composed, and self-produced by Iyori Shimizu, it humorously weaves the ideal of “what if we could be lovers?” over a bright melody.

With its lively tempo, it seems perfect for riding the rhythm in a fun mood.

Because the A melody is sung lightly, the chorus feels like it lifts the energy a notch, with a bit more emotion coming through.

If you widen your eyes while singing the chorus, your voice should come out more smoothly.

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Kubota Mami

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my nameback number41rank/position

back number – My Name (full)

This is a gem of a medium-tempo ballad that portrays a profound form of love in which hearts connect simply by calling each other’s names.

Set to the gentle melodies woven by back number, it warmly sings of gratitude and devoted feelings toward someone precious.

Meeting someone who accepts your weaknesses and wounds, and the desire to give them everything—these emotions make for a bittersweet yet heartwarming song that leaves a deep impression.

Released as a single in May 2016 and included on the album “Encore,” this track was written as the theme song for the film “Wolf Girl and Black Prince.” It reached No.

6 on the Oricon Weekly Singles Chart and earned Gold Disc certification, becoming a popular hit.

It’s a heartwarming love song you’ll want to listen to while thinking of someone important to you, recommended for moments when you want to renew your gratitude for irreplaceable people—be they a partner, a friend, or family.

Sing of springback number42rank/position

Sing of spring

A track by the three-piece band back number from Gunma Prefecture, included on their 2009 mini-album “Nogashita Sakana” (“The Fish I Let Slip Away”).

It’s a ballad that tenderly sings of lingering regrets that remain despite a farewell, set against the gentle air of spring.

The song conveys a sense of helplessness and true-to-life pain—feelings that couldn’t be fully put into words and have nowhere to go—carried by an earnest band sound.

Later featured on their 2016 best-of collection “Encore,” this long-loved piece is a bittersweet yet warm breakup song, recommended for those who chose to part ways without ever growing to hate the other person and are left struggling with unresolved emotions.