Ken Hirai Ballad Songs: Popular Song Rankings [2026]

ParadiseHirai Ken11rank/position

Paradise (Ken Hirai) / Ayano

This “Rakuen” is Ken Hirai’s eighth single, released in 2000.

The song was a hit, wasn’t it? I think it was one of the tracks that sparked his breakthrough.

With R&B elements and a very mature, seductive melody, it was a song that matched Hirai’s image perfectly.

RingHirai Ken12rank/position

Ken Hirai “Ring” MUSIC VIDEO

It’s the theme song for the NTV Wednesday drama “Psycho Doctor,” and Ken Hirai commented that he created it with the thought, “Maybe everyone is hurting in some way.

Rather than running away from those emotional wounds, it’s important to take your time and love them.” It’s a touching ballad that many people say has saved them.

The tempo is relaxed, making it easy to sing calmly, which is a nice point.

It may not be a very famous song, but the melody line is simple, so I think it’s easy to remember.

There’s a key change before the last chorus that raises the vocal range, so be careful with that part.

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Kubota Mami

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Dear daysHirai Ken13rank/position

Ken Hirai 'Dear Beloved Days' MUSIC VIDEO

Produced by Kiyoshi Matsuo for the first time in ten years to cap off the 15th anniversary, this exquisite ballad, tinged with sadness yet evoking hope for the future, was released on May 4, 2011 as the theme song for TBS’s Sunday drama JIN: The Final Chapter.

The song spans a very wide vocal range from G#2 to C5, with a clear structure where the range gradually rises from the A verse to the B verse and then the chorus.

The low notes in the A verse are pitches you don’t often use, so be careful not to let your voice get muffled.

Take a deep breath and project your voice forward, letting the air flow.

The start of the chorus uses phonemes that make falsetto easy to produce, so if you really let your head voice resonate, you should be able to hit the notes without any problem.

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Kubota Mami

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I love you.Hirai Ken14rank/position

Ken Hirai “Aishiteru” Music Video

A fragile, gentle ballad produced by Seiji Kameda that sings of the sorrow and love of losing someone dear, it served as the theme song for the film “Ghost: Mou Ichido Dakishimetai,” released on November 10, 2010.

A dramatic signature song commemorating the 15th anniversary of his debut, its music video features Ken Hirai himself giving a powerful performance as a deceased man, resulting in a deeply moving work.

The song’s overall vocal range is E3–D5, roughly two octaves, and as long as you can produce low notes and falsetto without strain, it shouldn’t pose much difficulty.

Try projecting your voice as if pulling it toward the back of your head—you may find it a bit easier to sing.

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Kubota Mami

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