In 2012, we were introduced to singer-songwriter Leo Ieiri, who made a sudden debut with “Sabrina” and immediately ranked 9th on the Oricon chart.
Leo Ieiri moved to Tokyo at 17 and debuted a year later.
Since her debut, her popularity has steadily grown, and she now performs theme songs for many TV dramas and films.
Her name “Leo” is a stage name; it’s said to have originated when the president of her agency saw her and remarked that her eyes looked like a lion’s.
Please enjoy her beautiful, straight, soaring vocals.
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Leo Ieiri’s Best and Popular Songs (1–10)
Love letterNEW!ieiri reo

It’s a song told in the tone of a letter, awkward yet full of deep affection for the other person.
Written from the perspective of a boy being led around by a girl, the lyrics brim with a warm outlook that embraces even the whims of the one he loves and imagines a future together as they grow older.
In fact, before it was included on the single “Mirror,” released in November 2025, this special track had no plans for an official recording and was performed only at live shows, nurtured with care alongside the fans.
The song was written and composed by Shunichi Tanabe of BLUE ENCOUNT.
Reo Ieiri’s soaring vocals vividly portray a down-to-earth, honest feeling of love.
It’s perfect for those moments when you want to feel that quiet resolve that comes with wishing to stay with someone forever in the everyday flow of life.
Mirror feat. Kosuke Saitoieiri reo

This is a collaboration between the accomplished singer-songwriter Leo Ieiri and Kosuke Saito of UNISON SQUARE GARDEN.
Released digitally in October 2025, the song was written as the theme for NTV’s Wednesday drama “ESCAPE: It Was Supposed to Be a Kidnapping.” Featuring lyrics that use mirrors as a motif, it portrays the struggle of facing oneself and a world where reality and illusion intersect.
The two voices overlap as if in dialogue, creating profound emotional depth.
It’s a duet that gently supports the hearts of those who keep pursuing their dreams.
Helloieiri reo

A song included on the second single, “Shine.” Its lyrics gently comfort you with the theme: it’s goodbye, but not goodbye forever—no matter the distance, I’ll be by your side.
The melody is catchy too, making it a perfect track for saying a cheerful bye-bye.
Sillyieiri reo

This song served as the theme for the drama For N, starring Nana Eikura and based on Kanae Minato’s work.
It’s astonishing that someone in their teens could write such mature lyrics centered on a theme like “love is foolish.” The drama itself was deep and thought-provoking, so I think the song matches it very well.
Shineieiri reo

This is the song that was used as the theme for the Fuji TV drama “The Queen of the Frogs,” starring Yuki Amami.
Sota Fukushi, who is in the same agency as Leo Ieiri, has also said this is his favorite among her songs.
It’s a refreshing, uplifting track that gives you courage when you listen to it.
For youieiri reo

A track included on the regular edition and the first limited edition A of the seventh single, “Junjou.” It was also used in a commercial for the company Kuraray.
The vocals gently switch between chest voice and falsetto, giving a feeling of the heart being revealed.
Rather than saying “Do your best,” it’s a song that feels like it runs by your side, saying, “Let’s do our best together.”
Massageieiri reo

A song filled with a positive message.
According to Leo Ieiri, she created it with the desire not to turn weakness into a bond, but to walk forward together toward tomorrow.
It was also chosen as the theme song for TBS’s Monday Mystery Theater, “Kakushō: Keishichō Sōsa 3-ka.” I think it captures the spirit of Monday in a good way.



