Prium Front Cover

Prium

RiRiUM, project AMBIVALENCE & $.odÅ

Release Date

2026-03-28

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Track List

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Prium-the long-awaited 1st album from RiRiUM, a vocal unit featuring the distinct voices of Rikka, Rinpopo, and Umachan.

The title Prium is a portmanteau of the Italian word "Primo" (meaning first or the beginning) and the unit's name, RiRiUM. This album serves as both their origin and their latest pinnacle, encapsulating the vivid scenes of their "beginning."

The tracklist features a diverse array of songs created in collaboration with trackmaker $.odÅ, including their debut release, "FLAME (feat. RiRiUM)," and their first original commission, "Lily (feat. RiRiUM)." From electro-pop and R&B to hard rock and emotional ballads, their vocal work shifts colors like a kaleidoscope. Yet, at its core remains a consistent, radiant vitality-a light to illuminate the chaos of the modern world.
Experience the delicate fusion of intricate three-part female harmonies and roaring guitar sounds found nowhere else.

Having maintained a steady momentum into their second year-with a regular radio program, collaborations with game creators, and successful solo live concerts-RiRiUM now presents a melody of resolve to mark the start of the new year.
Through every expectation and every uncertainty, RiRiUM is with you.

For this is only just...
our "Garden of Beginnings."

Artist Profile

  • RiRiUM

    RiRiUM is a three-person vocal unit consisting of Rikka, Rinpopo, and Uma-chan. The songs are written by $.odÅ, a composer and Vocaloid producer affiliated with project AMBIVALENCE. Rinpopo, who has a powerful and versatile singing voice, is the main vocalist, while Uma-chan, a former announcer, supports the songs with her low notes, and Rikka, also a project AMBIVALENCE member, sings in the high notes, creating a deep harmony in their rock-based songs. Formed in 2024, they currently perform live and stream mainly in Tokyo.

  • project AMBIVALENCE

    He launched the project AMBIVALENCE, collaborated with various artists, and produced and released numerous songs. He has also released songs under the name $.odÅ and is expanding the range of his activities. He has also started activities as a Vocaloid P, developing multifaceted expressions.

    Artist page

  • $.odÅ

    With roots in rock sound, he specializes in a variety of songs that make full use of distorted guitars and delicate lyrics. He also collaborates with and produces various artists, and has released many songs under the project AMBIVALENCE. He has also started activities as a Vocaloid Producer, developing multifaceted expressions.

    Artist page

project AMBIVALENCE