TOMOO Talks New ‘Blue Box’ Ending Theme Song ‘Contrast’ & Artistic Attribute She Wants to Keep: Interview
Written by djfrosty on March 18, 2025

Tokyo-born singer-songwriter TOMOO — pronounced “tow-mow-oh” — has been playing the piano since she was a child and began working on music in earnest in middle school when she began writing original songs. Her voice has been praised by top Japanese artists and her first full-length album, TWO MOON, reached No. 15 on Billboard Japan’s Hot Albums chart after dropping in Sept. 2023. She was featured in many music programs the following year, and in her MONTHLY FEATURE interview with Billboard Japan, she looked back and shared, “Rather than there being a milestone somewhere like a major change or turning point, 2024 felt like a year when a lot of my activities advanced another step or another level as an extension of the year before, whether it’s about live shows or TV appearances.”
When asked how she would introduce “what kind of artist TOMOO is,” the 29-year-old musician replied, “Yin and yang, old and new. Sometimes people who listen to my music say I seem to have a lot of life experience, but other times they say I still have a boyishness or girlishness about me. That’s an attribute I want to keep. Even when it’s bright, a shadow comes along with it, and even in shadow, a hint of light can be seen in the distance. Having both light and shadow is also my individuality.”
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“Rather than always having something I want to express, I want to be able to give form to the things that come into my mind at any given time,” says the “Grapefruit Moon” artist, explaining that she tries to be like a transparent vessel instead of dyeing herself a particular color. “When I was a teenager, I wanted something that would make it easy to visualize my individuality, but recently I’ve started to think that maybe that’s not necessary. I have the 12 years I’ve been doing this. At the time, I didn’t have a past to look back on and my way of thinking was still very superficial. So I used to think that if I worked hard at something or suffered more, I’d be able to figure out who I am. But it didn’t work that way. I guess that’s why I thought, ‘Then maybe that’s just the way it is.’”
Her latest single, “Contrast,” is currently being featured as the ending theme for the anime series Blue Box Season 2. The show is based on a manga series currently being serialized in Weekly Shonen Jump, and tells the coming-of-age love story of high school students devoted to their club activities. ”I started reading the original manga after being tapped to write the song. I wasn’t sure if I could relate to the transparency and freshness of the story, and to the feelings of the characters who are about 10 years younger than me,” TOMOO admits. “But I really did write songs like that when I was a teenager, and wanted to sing the theme song for a work like that, so I was happy when they asked me to do it.”
“Some people said that the character of the song seemed simpler than usual, and that makes sense in a way,” she explains. “It’s the simplicity of high school students concentrating on the moment in front of them within the limited ‘box’ of their time, season and environment, and it’s also the simplicity of feeling both happy and sad with your whole body when you haven’t yet developed emotional immunity. I thought about the lyrics while reading the original manga, trying to evoke the feelings I had when I was around 15 years old.”
For TOMOO, creating “Contrast” was an experience that took her back to her youth. “I wrote the chorus and the music pretty much at the same time, but wrote the first verse (A-melody) from scratch at the piano,” she shares about the writing process. “It was just like how I used to write music when I was a teenager. It turned out a lot more somber than I’d expected, but I figured that was fine because it was the result of the memories of my five senses having seeped out and not something I’d come up with in my brain. It was like I was facing the piano with nothing in mind, and my senses and the honest spirit of the song took the lead. It’s been a while since I’ve written music like that.”
The singer-songwriter worked with Ryo Eguchi, a music producer and arranger who has worked on numerous Japanese pop, idol and anime songs, for the first time on the song’s arrangement. “I’d been aware of Mr. Eguchi since I was around 20 years old. When I was in elementary and junior high school, I liked a lot of anime music that he’d arranged, so I’ve always wanted to ask him to arrange something for me if I ever had the chance to be involved in anime,” TOMOO recalls, going on to say that “Contrast” started out with a solid band-based sound but turned out to be a dramatic piano ballad with deep, resonant synth and cello tones. “Because it was quite heartfelt when I was composing it, I wanted to add elements that would evoke a sense of environmental coolness, like the wind, the sky, and the shadows of buildings. I asked him to add in some programmed rhythms and electric guitar strumming that sounds like strings in the distance, to give it a slightly structured, cool feel, to balance out the sense of temperature.”
The “Super Ball” singer is set to headline a solo concert in May at the historic Nippon Budokan for the first time in her career. She expresses enthusiasm for the upcoming show, saying, “I want to make this concert even more meticulous than my previous ones. I’ve always done my best within the schedule laid out for each show, but this time we’ve talked it over and set aside as much time as possible to prepare.”
“I always thought that the Budokan would be a kind of culmination, a milestone, a goal of that sort,” the singer-songwriter adds. “But I’ve started to feel that it’s not like that, now that I’m actually going on that stage. I realized it’d be better to leave it up to the feelings and mindset of each person who comes to see me. So I’m going back to my roots. Psychological closeness and sounds. When I first started out, I did a show on the floor. With the audience all around me, it was a bit scary before the show started, but I was really focused during the performance and there was tension in every moment. I want to recall that feeling of being nervous and excited at the same time when I perform at the Budokan.”
—This interview by Takuto Ueda first appeared on Billboard Japan