Koji Wada is best known for “Butter-Fly,” the opening theme of the anime Digimon Adventure, which was both his debut single and his signature song.
Due to two hiatuses for medical treatment and his comebacks thereafter, he was also known as the “Immortal Butterfly of Anisong.”
Even after his passing in 2016, his songs and the way he lived continue to be talked about.
Here, we present a ranking of Koji Wada’s most popular songs for karaoke.
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Koji Wada’s Most Popular Karaoke Songs Ranking [2026]
Butter-FlyWada Kōji1rank/position

One of the defining anime songs of the Heisei era, this popular track frequently ranks near the top in all-time anime song lists! It’s characterized by its uptempo, powerful melody and vocals, and plenty of people sing it at karaoke.
The chorus in particular stays in the high register, so your stamina and vocal power will be tested.
If you let your guard down even for a moment, your pitch can drop into your throat.
This is a part where you really want to belt comfortably in chest voice, so take in a big breath through your mouth and project your voice far and confidently.
Just that alone should help your voice carry much better.
Keeping your energy up while singing is important too!
Butter-Fly~tri version~Wada Kōji2rank/position

The one and only “Immortal Butterfly”: Koji Wada’s soulful masterpiece and his final work.
This is his last rendition of Butter-Fly (2015 rearranged version), recorded after repeated hospitalizations and battles with illness.
Due to his condition, his voice changed a little, but it became gentle, refreshing, and truly beautiful.
To you, who were once one of the ‘Chosen Children.’


