Heterogeneity / Double Royal Blue

The mowl® Ambassador Kenta Kushiro Signature Model, “Heterogeneity,” is a mono-metal yoyo designed to match Kenta’s technical string trick style, combining stability with crisp, precise play.

The iconic OG color of Heterogeneity, Royal Blue, returns in the Regular Logo edition.

Left / Right: Heterogeneity OG Logo | Center: Heterogeneity Regular Logo

To celebrate the release of Overgeneity, Double Royal Blue arrives as a special edition — featuring Heterogeneity’s iconic OG color paired with matching engraving.

"Heterogeneity" / Double Royal Blue

Finished in Royal Blue with matching laser engraving, this colorway brings together the iconic OG look of the Heterogeneity series in a clean, unified visual.
Understated and refined, it carries a quiet elegance with a distinctive presence — a special commemorative colorway.

In 2021, Kenta Kushiro relocated from Tokyo to Osaka, where mowl is based. This move strengthened the trust between Kenta and mowl, while reigniting his presence in competitive yoyo events.

To support Kenta’s vision, mowl committed as a manufacturer to develop a yoyo that would maximize his potential. Development began immediately, with the project officially starting in summer 2021.

Reassessing Kenta’s playstyle, known for delicate and skillful tricks, the team incorporated elements and tricks previously unseen in his repertoire. To fully harness his abilities, the yoyo needed:

 • flexible maneuverability
 • smooth glide
 • stability and power to handle long combos
 • a solid yet gentle feel at the core

While trends dominate much of the yoyo market, the prototype developed for Kenta diverged entirely from current trends. The result is Heterogeneity, a rare product for mowl: a mono-metal yoyo that combines exhilarating playability, carefully balanced weight with zero stress, and competition-ready performance.

With the 2nd production lot, the Heterogeneity artwork was updated to further enhance its theme of “heterogeneity – diversity in unity.”

 • 1st Lot: The face prominently featured engraved artwork emphasizing the “angel” motif.

 • 2nd Lot Update: The angel wings were replaced with clouds to reflect the updated theme. A circle logo was added for balance, incorporating hidden “Heterogeneity” text. Within the clouds, both angels and demons were illustrated, adding playful depth to the piece.

The cloud-shaped wings hint at an angel nearby, subtly conveying a personal message. Whether it whispers guidance from an angel or a fallen angel (demon), Heterogeneity becomes a companion that resonates with your lifestyle.

 • Born: July 27, 2000, Hokkaido, Japan (raised in Tokyo)

 • Started Yoyoing: 2011, inspired by the Third Generation Hyper Yoyo

 • Influences: From 2013, inspired by international players like Charles Haycock and Petr Kavka on YouTube, developing original and unique tricks

 • Achievements: 2016 – Semifinals, 1A Division, World Yoyo Contest, Cleveland, USA

 • Joined mowl: Fall 2018