Kazuhiro Hirai’s songs that are easy to sing. Songs I want to sing with emotion.
Ken Hirai, known for his sweet, rich vocals, has delivered numerous classic songs.
From Hitomi wo Tojite to POP STAR and the drama theme Itsuka Hanareru Hi ga Kitemo, many people probably want to try singing them at karaoke.
However, we often hear that his distinctive vibrato and wide vocal range can feel intimidating and hard to tackle.
In this article, we’ve picked out relatively easy-to-sing songs from Ken Hirai’s catalog and introduce them while touching on their vocal ranges and melodic characteristics.
Use this as a reference when choosing your next song!
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- Easy-to-sing recommended songs by back number [for karaoke song selection]
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- [For People in Their 50s] Ranking of Easy-to-Sing Karaoke Songs [2026]
- [Even If You're Tone-Deaf, It's Okay!] Easy-to-Sing Karaoke Songs and Practice Tracks
- [Karaoke] A roundup of easy-to-sing songs by Yosui Inoue
Ken Hirai's easy-to-sing songs. Songs you want to sing emotionally (1–10)
Make my heartNEW!Hirai Ken
This is the theme song for Doraemon the Movie: Nobita’s Great Adventure in the Antarctic Kachi Kochi, released on March 1, 2017.
It was her first anime theme song, written to evoke the bond between Doraemon and Nobita—a touching medium ballad that resonates with the heart.
The accompaniment is piano throughout, and if you sing without rushing, the tempo shouldn’t run.
Since it’s basically sung gently, lightly resonating in the nose and head as if you were humming will suit the atmosphere perfectly.
When humming, use plenty of breath as if you’re humming a tune.
Be careful not to produce the sound in your throat, as that will turn into a throaty voice.
half of meNEW!Hirai Ken
It’s the theme song for Fuji TV’s Thursday drama “Twilight Meteor Shower: Midlife, Falling in Love,” a “phantom love ballad” that had been kept under wraps for about nine years since 2009, and it’s said to depict the world ten years after his signature song “even if.” In the music video, it’s striking how half the screen is composed of “blank space” like walls and doors to express the feeling of losing something precious.
Ken Hirai’s beautiful, heartrending voice resonates over the piano accompaniment.
When you sing it, if you deliver each lyric carefully, I think you can recreate that beautiful vocal quality.
Try to be mindful not to rush through it carelessly.
You are my friend.NEW!Hirai Ken
This is the theme song for the Fuji TV drama “Wonderful Life” starring Takashi Sorimachi, and it marks the first time Ken Hirai has attempted a “one-man a cappella,” with every sound recorded using only his own voice and body—resulting in a soothing piece.
The song’s overall vocal range is B2 to C#5, and since Ken Hirai’s songs typically have wide ranges, the key point is how to produce the high notes with ease.
As this work isn’t the type that requires belting, it’s best to keep a light singing approach throughout.
For both low and high notes, aim to resonate in the head while lifting your facial muscles as you sing.
Kenshi Hirai’s easy-to-sing songs. Emotionally expressive songs (11–20)
Love Love LoveNEW!Hirai Ken
It’s a song that starts a cappella and incorporates handclaps and gospel-style choruses, singing about love in a fresh and emotionally rich way.
It’s used as the ending theme for the TBS show “Ai no Hinadan.” The track itself features a simple arrangement with piano accompaniment.
Falsetto works well, but belting in a chest-voice style can also sound great.
Just be careful not to strain your throat by pushing too hard.
Using gestures and engaging your whole body while singing can help you stay relaxed, so have fun and sing your heart out.
RingNEW!Hirai Ken
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.
Even if the day comes when we partHirai Ken
Precisely because we love, our hearts ache at the thought that a farewell will someday come.
Someday We’ll Have to Part, which captures that feeling, was released in 2008 and was chosen as the theme song for the film I Remember the Sky.
Its lyrics remind us that even happy days will one day end, which is why we should cherish the present and love the people we care about with all our hearts.
With its gentle melody and a range that isn’t too wide, it’s easy to sing.
Try singing it while thinking of someone precious to you.
Close your eyesHirai Ken
“Close Your Eyes” is a song that expresses the determination to overcome a painful farewell while feeling the lingering presence of a loved one.
Released in 2004, it was used as the theme song for the film “Crying Out Love, in the Center of the World” and became a massive hit alongside the movie.
Although its wide vocal range makes it a challenging piece, its high recognition is a major reason it’s an easy pick for karaoke.
The tempo is gentle, so try singing it in a key that suits your voice.
It has been covered by many artists, regardless of gender—such as Akira Fuse and Ayaka—so you might also want to check out the cover versions for reference!