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Ayaka / Rainbow-Colored

“Nijiiro” was sung by many people in vocal training as well.

Of course, many also chose “Mikazuki,” but “Nijiiro” was especially popular because people said, “I can sing it without straining!” Indeed, during lessons, everyone seemed to relax well and found it easy to sing.

The overall range is F#3 to D5, which looks wide if you only consider the range, but since F#4 is used the most, there’s no need to be overly tense.

Also, for the flowing melody in the pre-chorus, if you don’t articulate every word too clearly and just go with the flow, you can avoid getting stuck.

For the last part of the chorus, if you sing each note carefully, it feels good and helps you stay on pitch.

There are points to focus on for each section of the melody, but you’ll likely find it easy to sing—so definitely try learning it.

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Ayaka – Crescent Moon

This ambitious work powerfully sings of the aching feelings of longing for a faraway lover.

Released as a single in September 2006, it showcases Ayaka’s outstanding expressive ability to the fullest.

The song is memorable for its forward-looking resolve to overcome parting and loneliness with a loved one, as well as its strong will to keep thinking of that person, while also conveying a sense of a positive future.

It was featured as the CM song for au’s “LISMO” and as the theme song for NHK General TV’s “Tsunagaru TV @ Human,” and it won the Best New Artist Award at the 48th Japan Record Awards.

It’s a song that offers comfort to those in long-distance relationships or anyone who has experienced a farewell with someone dear.

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Ayaka – Under the Same Sky

If you want to cheer up a friend who feels like last year didn’t go so well, I recommend Ayaka’s “Minna Sora no Shita” (“Under the Same Sky”).

Released in 2009, the song was originally written for one of Ayaka’s own friends.

The lyrics carry a message to a friend: “You’re a kind person who gives your all, and you’re amazing for bringing smiles to those around you.” How about singing it to a friend who’s feeling down, with the thought, “You have so many wonderful qualities, so it’s going to be okay”? I’m sure that if you sing it for them, your friend will be able to find their genuine smile again this year!

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Ayaka – I believe

The moving message Ayaka weaves with her soulful voice resonates deeply with everyone.

When it was released in February 2006, this work captured many hearts with its powerful vocals that shook listeners and its highly relatable lyrics about singing of the courage to believe in oneself despite uncertainty.

In addition to being chosen as the theme song for the TBS drama “Rondo,” it was also used in a program by her close friend, figure skater Miki Ando, drawing even more attention.

If you sing it earnestly at karaoke, you might just win the heart of the one you like!

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Kobukuro – WINDING ROAD (Ayaka × Kobukuro)

This song resonates with a refreshing melody that evokes the arrival of spring and warm lyrics that give you the courage to move forward.

A collaboration between Ayaka and Kobukuro, it was released in February 2007 and became well-known as the theme for the Nissan Cube commercial.

As you walk the winding road of life, it gently speaks to the importance of believing in a small light and moving forward step by step—making it the perfect cheer-up song for those feeling anxious about a new life or fresh challenges.

Wrapped in vocals that feel close to the heart, you’ll find the courage to keep walking in your own way.

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Ayaka / “Aikotoba” Music Video

A beautiful ballad sung by Ayaka that became the theme song for the film “The House Where the Mermaid Sleeps.” In the movie, the image of a mother who continues to protect her child—believing in a miracle while the child remains unconscious—left a deep impression, didn’t it? “Aikotoba” is a song themed around an eternal love that conquers everything, and its lyrics—crafted as Ayaka faced the story head-on—truly resonate with listeners.

It’s a song imbued with deep, boundless, unconditional love that dispels anxiety; please try singing it with great care.

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Ayaka / Circle of Thanks

A heartfelt ballad that warmly wraps feelings of gratitude toward family and friends.

Ayaka’s powerful yet gentle voice speaks on behalf of the “thank you” that’s hard to express in everyday life.

Through universally relatable scenes—the warmth of a mother’s hand, tearful memories with friends, and the sunset sky looked up at on the way home—the song richly depicts love for the people who matter most.

Since its release in October 2013, it has warmed many hearts, featured as the 40th anniversary campaign song for Nestlé’s KitKat and in commercials for CHOYA Umeshu.

Cherished as a message song of gratitude for loved ones, it continues to be embraced as a track that colors irreplaceable moments such as weddings and anniversaries.