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A classic heartbreak song! A cover of HY’s “366 Days.”

When it comes to classic heartbreak songs, HY’s “366 Days” is a must.

Released in 2008, it was selected as the theme song for the drama and Toho-distributed film Red Thread.

In 2018, it had a resurgence when Moka Kamishiraishi sang it in a Kirin Afternoon Tea commercial.

Regardless of generation, it’s a song many of you have likely heard at least once.

In this article, we’ll introduce cover versions of “366 Days.” From various famous artists to independent singers and YouTubers, there’s plenty to enjoy!

Masterpieces of heartbreak songs! Cover versions of HY’s “366 Days” (1–10)

366 daysKamisiraishi Moka

Moka Kamishiraishi releases full version of her performance of HY’s “366 Days”; a must-see, deeply moving video that connects feelings for Minami Aso — Kirin Gogo no Kocha “I want to see you, I want to warm you. Another Story” edition
366 daysKamisiraishi Moka

I thought she was just singing as an extension of a beverage commercial, but wow—what a truly wonderful singing voice.

It’s true there’s a slightly awkward feel, but the way she sings so full of emotion brings tears to my eyes.

Precisely because it’s not her main profession, I think it’s turned into a really great piece.

Highly recommended.

366 daysShimizu Shota ft. Nakasone Izumi

Shota Shimizu feat. Izumi Nakasone (HY) “366 Days Short Ver.”
366 daysShimizu Shota ft. Nakasone Izumi

Both Izumi Nakasone and Shota Shimizu have soulful voices, but I felt Shota Shimizu’s was more refined and delicate.

Because of that, this “366 Days” comes across not as a powerful ballad, but rather as a gentle one you can listen to calmly.

It made me realize how much a song can change when the singer changes, even with the same arrangement.

Highly recommended.

366 daysGoose house

It’s a performance with a small ensemble—male lead vocal and piano, plus two female backing vocalists—but the male vocalist’s singing is unbelievably powerful.

His falsetto is especially beautiful, and even with the piano playing few notes, its expression fills every space.

It makes you feel that you don’t need fancy gear or a top-notch studio—if the singer has the talent, that’s enough.

Highly recommended!

Classic heartbreak songs! HY “366 Days” cover versions (11–20)

366 Days (English Ver.)Maori & Homare

[MV] The English version of “HY / 366 Days” by a 19-year-old from Okinawa is incredibly moving!!
366 Days (English Ver.)Maori & Homare

This cover song is drawing attention for a calm, poised voice that’s hard to believe comes from a 19-year-old, along with native-level English vocals.

Sung in English, it has a cool vibe and offers a unique world that meshes perfectly with the guitar sound.

If you’re good at English, why not use this as a reference for singing the English version?

366 daysSOLIDEMO

SOLIDEMO / 366 Days (HY Cover)
366 daysSOLIDEMO

“366 Days” has also been covered by male artists; in this case, the three-member male group SOLIDEMO performs it.

Their trio harmonies are powerful, making it compelling as a breakup song from a male perspective.

It’s a cover that conveys both sensuality and strength born from men singing a song originally by a woman.

366 daysAzusazawa Hideki × Hori Yui

[Duet] 366 Days (HY) with Lyrics – Full Cover by Hideki Azukizawa × Yui Hori
366 daysAzusazawa Hideki × Hori Yui

This is a male-female cover song by Hideki Azukizawa and Yui Hori, who have been gaining attention for appearing on Karaoke Battle.

Their two voices express a man and woman’s romance, offering a worldview you can’t experience from the original.

The beauty of their harmonies conveys both strength and the storytelling of “366 Days.”

In conclusion

We introduced cover versions of HY’s classic song “366 Days”! What did you think? Every artist sang with deep emotion, and each one’s unique strengths really stood out.

Besides the artists we featured, there are many other cover videos available.

If you’re thinking, “I want to hear more!” be sure to check those out, too.