When a song released more than five years ago suddenly rockets back into the Top 5 of Japan's streaming charts, we know something special is happening. Vaundy's "Shiawase" (しわあわせ), originally released on April 11, 2021, surged to No. 5 on the Oricon weekly streaming chart for the tracking period of October 5–11, 2026, marking its first-ever Top 5 appearance and drawing over 5.3 million streams in a single week. We're here to walk you through what sparked this remarkable comeback, what the numbers really mean, and why this quietly beautiful track is finding a whole new audience.
The Quick Version
- "Shiawase" by Vaundy rose from No. 60 to No. 5 on Oricon's weekly streaming chart, recording approximately 5.35 million streams during October 5–11, 2026.
- The song was selected as the theme for the film Mama ga Mo Kono Sekai ni Inakute mo: Watashi no Inochi no Nikki ("Even if Mom Is No Longer in This World: The Diary of My Life"), starring Haruna Kawaguchi, which was released on October 2, 2026.
- This weekly total exceeded the song's previous peak from April 2021 by more than double.
- The track reportedly surpassed 200 million cumulative streams, becoming Vaundy's 13th song to reach that milestone.
- The song was originally released digitally on April 11, 2021.
What Brought "Shiawase" Back Into the Spotlight
We've all experienced that bittersweet feeling when an old favorite resurfaces at just the right moment. For "Shiawase," that moment arrived when it was chosen as the theme song for Mama ga Mo Kono Sekai ni Inakute mo: Watashi no Inochi no Nikki, a film that opened in Japanese theaters on October 2, 2026. The movie stars Haruna Kawaguchi and explores deeply emotional themes of family, memory, and resilience—territory where Vaundy's tender, introspective songwriting feels utterly at home.
The pairing proved to be a perfect match. When audiences began streaming the film's soundtrack and searching for its theme, "Shiawase" found a fresh wave of listeners who may have missed it the first time around. The song's quiet beauty—Vaundy's gentle vocals paired with understated production—resonates powerfully with the film's emotional core, and that connection translated directly into streaming numbers.
During the October 5–11 tracking period, the song drew approximately 5.35 million streams across major platforms. To put that in perspective, the track's previous weekly high from back in April 2021 was just over 2 million streams. This new surge more than doubled that figure, proving that the right context can breathe new life into a song years after its release.
Understanding the Chart Numbers
We should clarify what the various chart positions mean, because there has been some confusion in the reporting. On Oricon's regular weekly streaming chart—which simply ranks songs by total stream count—"Shiawase" jumped from No. 60 to No. 5, a dramatic climb that reflects the sheer volume of plays the song received.
There's also a separate "streaming surge" ranking that measures the rate of increase in daily average streams. While some reports initially suggested "Shiawase" topped this surge chart with a 169.1% increase, the official Oricon ranking page shows the song at No. 6 with a 69.9% increase for the same period. The discrepancy appears to stem from conflicting secondary sources, and without official clarification, we can't confirm the No. 1 surge ranking claim. What we can say for certain is that the song made a significant leap on the main streaming chart—and that's the number most listeners care about.
Regardless of the exact surge percentage, the story here is clear: a five-year-old track found its way back into Japan's streaming Top 5, and it did so on the strength of a heartfelt film tie-in and word-of-mouth momentum.
What Makes "Shiawase" Resonate
If you're not yet familiar with the song itself, "Shiawase" showcases Vaundy at his most delicate. The title translates roughly to "happiness" (though the artist has chosen a playful, slightly unconventional kanji spelling), and the track captures a wistful, almost fragile sense of contentment—the kind that feels precious precisely because it's fleeting.
Vaundy's style tends to blend indie-pop sensibilities with subtle electronic touches, and "Shiawase" is no exception. The production remains spacious and uncluttered, allowing the lyrics and melody to breathe. It's the sort of song that works just as well as a quiet companion during a late-night drive as it does soundtracking an emotional film scene.
The track's endurance is also a testament to Vaundy's growing stature in the Japanese music scene. With "Shiawase" now reportedly crossing 205 million cumulative streams and becoming his 13th song to pass the 200-million mark, we're watching an artist who has built a deep catalog of beloved work—and whose older material continues to find new audiences years down the line.
The Power of Film Tie-Ins in the Streaming Era
We've seen this pattern before: a song that performed well upon release gets a second (or third) life when it's paired with a film, television series, or advertisement. In Japan, where film soundtracks remain a major driver of music discovery, the right placement can transform a modest hit into a cultural phenomenon.
What's particularly interesting about "Shiawase" is that it wasn't a brand-new release engineered specifically for the film. Instead, the filmmakers reached back into Vaundy's catalog and selected a track that already existed—one whose mood and message aligned perfectly with their story. That creative choice paid off, introducing the song to moviegoers who might never have encountered it otherwise.
In the streaming era, this kind of revival is easier than ever. Unlike the days when a song's commercial life ended once radio stopped playing it, streaming platforms give older tracks the chance to rack up millions of new plays years after release. All it takes is the right spark—a viral moment, a playlist feature, or in this case, a film premiere.
What People Are Saying
Fans have been vocal about their excitement over "Shiawase" finding a new audience. One listener shared on social media that they were moved to tears hearing the song in the theater, writing that it captured the exact emotion they felt while watching the film's closing scenes. The pairing, they said, felt like it was always meant to be.
Another fan noted that they'd loved the song since 2021 but had watched it gradually slip out of regular rotation on playlists—until the film brought it roaring back. They expressed gratitude that a whole new generation of listeners would now discover what long-time Vaundy fans have known all along: that "Shiawase" is one of his most beautifully crafted tracks.
Several others commented on the song's streaming milestone, celebrating the fact that it has now joined the ranks of Vaundy's most-played work. For them, the chart resurgence felt like validation—a reminder that great songs don't have expiration dates, and that quality eventually finds its audience.
Frequently Asked Questions
When was "Shiawase" originally released?
"Shiawase" was released digitally on April 11, 2021. It has been available on major streaming platforms since that date.
What film features "Shiawase" as its theme song?
The song serves as the theme for Mama ga Mo Kono Sekai ni Inakute mo: Watashi no Inochi no Nikki ("Even if Mom Is No Longer in This World: The Diary of My Life"), a film starring Haruna Kawaguchi that was released in Japanese theaters on October 2, 2026.
How many streams did the song receive during its resurgence?
During the October 5–11, 2026 tracking period, "Shiawase" recorded approximately 5.35 million streams, more than doubling its previous weekly peak from April 2021.
Did "Shiawase" reach No. 1 on any chart?
The song reached No. 5 on Oricon's main weekly streaming chart, marking its first Top 5 appearance. There were conflicting reports about its placement on the streaming surge ranking, with official data showing it at No. 6 with a 69.9% increase.
How many total streams does "Shiawase" have now?
The song reportedly surpassed 200 million cumulative streams, reaching approximately 205 million total plays and becoming Vaundy's 13th track to cross that threshold.
Why This Comeback Matters
Beyond the numbers and chart positions, "Shiawase" offers us a heartening reminder that the shelf life of a great song isn't dictated by its initial chart run. In an industry often obsessed with the newest releases, watching a five-year-old track climb back into the Top 5 feels like a small victory for artistry and longevity. Vaundy's willingness to let his catalog speak for itself—and the filmmakers' decision to trust an existing song rather than commission something new—created a moment that benefited everyone: the artist, the film, and the listeners discovering the track for the first time.
As the film continues its theatrical run and more audiences encounter "Shiawase" in its intended emotional context, we may well see the song sustain its chart presence in the weeks ahead. Whether you're a long-time Vaundy fan or someone just now hearing his work, this is a perfect opportunity to explore a catalog that rewards repeated listening—and to witness firsthand how the right song, at the right moment, can reach across years to find exactly the audience it was meant for.
