A collection of timeless ballads sung by idols—songs that deeply touch the heart
When people think of idol songs, many might imagine bright, energetic tracks.
However, there are also many idol groups that sing beautiful ballads that truly touch the heart.
In this article, we’ll introduce a selection of wonderful ballad songs performed by idols.
We’ve chosen tracks that portray a variety of emotions and stories.
Be sure to read the lyrics as you listen, find your favorites, and take your time savoring their unique worlds.
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Ballad songs sung by idols: A collection of heart-touching masterpieces (41–50)
iNumber_i
This song, included on the 2024 release “No.O -ring-,” is a ballad that carries a message of savoring the small happiness close at hand without being greedy—saying that as long as I can be with you, just a handful of happiness is enough.
Alongside those warm lyrics, its mid-tempo progression and the inclusion of brass create a charming, blissful atmosphere.
The song was used in 2025 for SEKKISEI’s commercial “i Bright.
Clearer than snow.” The three members of Number_i also appear, dressed in pure white outfits, and their walk through a snowy landscape leaves a striking impression.
Only bots / Nothing but botsfantomu shiitaa
The eighth digital single, released in November 2025, is a Showa disco-style dance tune from Phantom Theta, a retro-horror-themed idol group produced by Ado.
It portrays the anxiety of falling in love with an ideal partner while not knowing whether they’re genuine or a fake, alongside a heartfelt yearning to be loved by someone anyway.
Set to a retro-pop sound, the song expresses the protagonist’s struggle to seek pure love in a world full of knockoffs.
Written and composed by Sasaki Kissa, it captures a world where cuteness and horror coexist, showcasing Phantom Theta’s multifaceted appeal in its most catchy form.
It’s the kind of track you’ll want to listen to when you’re struggling with online communication or craving a genuine connection.
That is a fairy.Boku ga mitakatta aozora
Debuting in 2023 and winning the Best New Artist Award at the Japan Record Awards in just one year, Boku ga Mitakatta Aozora are set to release their 7th single in December 2025.
The title track is a classic winter first-love song with lyrics by Yasushi Akimoto and music by Daisuke Shirai.
It tells a poignant story of a boy who is captivated by a girl he glimpses by chance on a train platform, and, seeing her as delicate like a fairy, keeps searching for her every morning.
Vivid scenes—winter uniforms, scarves, and crowded trains—tug at the heart, and it’s impossible not to empathize with the protagonist, who senses the love may never be fulfilled yet still engraves the feeling of “I truly fell in love.” The music video, featuring Ami Kanazawa in the center playing a transfer student, has drawn attention for its direction that shifts between reality and imagination.
Highly recommended for anyone who wants to revisit a softly bittersweet page of youth.
Cross the sea of tearsSnow Man
An uplifting cheer song by Snow Man that powerfully sings of hope overcome together with friends.
Even after painful farewells and setbacks, the lyrics—filled with a strong will to keep moving forward—are truly stirring.
The harmonies created by the nine members’ overlapping voices are robust, and as you listen, courage naturally wells up.
Released in January 2021 as a B-side to their third single, “Grandeur,” it was also used as the theme song for their TBS show “Sore Snow Man ni Yarasete Kudasai” and in commercials for Apamanshop.
It’s the perfect track for facing difficult situations.
I heard the sound of cherry blossoms blooming.＝LOVE
This is a heartwarming =LOVE song that gently conveys the arrival of spring.
It portrays a faint, bittersweet first love by likening the flutter of a first crush to the invisible scene of “the sound of cherry blossoms blooming.” The reasons the protagonist prefers riding in the third car of the school commuter train, and the care she takes with her hairstyle, convey the feelings of a girl earnestly navigating her first love despite her confusion.
Included on the May 2021 album “Zenbu, Naisho.” (“Everything’s a Secret.”), the song also drew attention for its refreshingly springlike visual beauty in the music video.
It’s a perfect track for the spring season—one that makes your heart flutter when listened to at the start of a new school term.
It’s recommended not only for those in love, but also for anyone who wants to enjoy the spirit of spring.
Assaulted by a love song＝LOVE
=LOVE is an idol group produced by Rino Sashihara.
Their 19th single, “Attacked by a Love Song,” set for release in October 2025, is a cute track about the impulses of love, featuring Maika Sasaki in the center position.
With an earnest message—wanting their feelings to be noticed even if their love is exposed—it vividly captures the exhilaration right before a romance begins.
The protagonist, swept away by a sudden rush of emotion, evokes listeners’ sweet and bittersweet memories.
Now, the moon is waxing≒JOY
≒JOY is an idol group that has been on a remarkable run since their debut in January 2024.
Released digitally in August 2025, this song is a love ballad that sings of pure feelings for someone special.
In fact, it’s a cover of a track that Ms.
Sashihara once wrote for HKT48.
The refreshing sound arrangement evokes the image of a star-studded night sky.
It’s the perfect dose of idol pop for when you want to immerse yourself in single-minded love.