Ken Hirai’s Most Popular Songs Ranking [2026]

You don’t know, do you?Hirai Ken43rank/position

[With Lyrics] You Don’t Know, Do You? / Ken Hirai — Theme Song for the drama “Unsolved Cases: Metropolitan Police Department Document Investigation Unit” [With Chords for Solo Performance]

This is a song written by singer Ken Hirai—known for “Hitomi o Tojite” and “Ookina Furudokei”—for the drama Unsolved Cases: Metropolitan Police Department Document Investigation Unit.

The mysterious lyrics match the drama’s story perfectly.

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LOVE OR LUSTHirai Ken44rank/position

Ken Hirai “LOVE OR LUST” Music Video

Released in October 2000.

With its upbeat hip-hop sound and stylish backing music, including musical elements and choral vocals, it’s a song popular among women for its sexy, sensual, and passionate lyrics.

The lyrics are so sexy that when I was a student, I listened to it secretly so my parents wouldn’t find out.

styleHirai Ken45rank/position

style

This is their 22nd single, produced by OCTOPUSSY.

Hirai once commented about this song on his own radio show (J-WAVE “FLYING EASY”), saying, “I like the song, but to be honest, it didn’t sell.” Its individuality and expressiveness, which hold their own against the edgy track, are a must-hear.

Buy My MelodyHirai Ken46rank/position

Buy My Melody

It was selected as the CM song for au by KDDI’s “LISMO!”.

Although it’s a song about a love that has ended, it’s a pop number that hints at the brightness of taking a new step forward.

It has the distinctive shy yet cheerful love-song quality unique to Ken Hirai, who combines exceptional musical sensibility with an unaffected, warmly textured vocal.

DESPERADOHirai Ken47rank/position

Desperado

I covered a classic by Glenn Frey.

It’s a perfect song for days when you want to relax.

In my case, I first came across this song on the night of my first heartbreak.

When I turned on the radio and listened, I felt like I gradually recovered from the breakup.

With its calm rhythm, it’s a song that lets you slowly heal your heart.

GREEN CHRISTMASHirai Ken48rank/position

GREEN CHRISTMAS

While singing about a realistic Christmas scene—one without white snow or Santa Claus—this ballad is imbued with deep prayer and love.

Released in December 2000 as the B-side to the single “even if,” it shipped 360,000 copies and was featured as the J-WAVE CHRISTMAS SONG 2000.

In the recording, they pursued an extreme laid-back feel, stripping back instruments to create space.

At Ken Hirai’s winter concept live series “Ken’s Bar,” it has long been beloved as the standard pre-show SE.

With a voice that gently envelops the heart, this is a recommended song for those who wish to offer a prayer on a Christmas night spent alone.

Gaining Through LosingHirai Ken49rank/position

Ken Hirai- GAINING THROUGH LOOSING LIVE

The song title literally means “what you gain by losing,” but as you read the lyrics, you realize it’s actually about “what you only notice after it’s gone.” It’s a piece that can be interpreted in many ways depending on the listener.

It’s a song you’ll want to listen to when you’ve lost your way and feel alone.