ONTSUBU LLC × David Cowan (Berklee College of Music)
The Groove
Method
A global artist training program built on rhythm, expression,
language, and mindset — for those serious about the world stage.
Now Accepting Early Partner Applications
Why Rhythm Is the Bottleneck
Japanese music reaching global audiences is growing. But in the global market, melody and timbre alone are not enough. What separates great from almost-great is groove — the design of time, backbeat, physicality, and ensemble conviction.
This domain has long been treated as something you either “have” or you don’t. No repeatable training existed. The result: “something feels off,” “time corrections end in vague language” — problems that repeat even in skilled teams.
“The notes are right. But why doesn’t it feel right?”
Japanese is structured around beats 1 and 3 — an on-beat language. Global pop and English drive from beats 2 and 4 — the backbeat. Without understanding this structural difference, the wall between “technically correct” and “globally convincing” remains invisible — and uncrossable.
The GROOVE Method makes this wall visible. Then removes it.
Before & After
- Time corrections end in vague sensory language
- Team members can’t share a common standard for groove
- “Something feels off” with no way to diagnose it
- Backbeat and phrasing feel stiff or unconvincing
- Performances don’t land globally despite technical skill
- Rhythm issues diagnosed with shared, precise language
- Entire team operates from the same groove standard
- Structural reasons for “off” feeling identified and corrected
- Backbeat, breath, attack/release, and weight understood physically
- Production and performance decisions made with conviction
Program Overview
The GROOVE Method is a professional program that organizes globally-demanded time feel and groove design into a form implementable in both production decisions and performance. It converts “sense-dependent” domains into trainable, team-shareable common language.
The program is grounded in global performance experience and structured using linguistics, auditory cognitive science, physics, and neuroscience. Each element is broken down until an entire team can share the same standard — and act on it.
Specific method content is shared individually after inquiry.
Pilot Results
A foundational workshop was conducted at Bridge You — a nationwide online musical actor training school founded by former Shiki Theatre Company members — in November and December 2024. Approximately 80 participants attended, with 41 completing the post-survey.
Global Music Understanding
Motivation for Global Expression
Survey Respondents
Ages 5–22
“I understood the difference between English and Japanese rhythm. I also felt the difference in accent.”
— K.A. (English vocals / accent)
“I struggle with English lyrics and musical rhythm. I realized it may be because I’m thinking in Japanese.”
— F. (English vocals / notation)
“The relationship between English words, context, and note length was verbalized and organized. It all clicked.”
— T.W. (English vocals / language × note value)
Development Team
Miyuki Tani
Lead Developer · ONTSUBU LLC Founder & CEO
Session drummer, music producer, composer, arranger, sound designer. US-based.
Performed with Chicago Blues Hall of Famer Magic Slim (2009). Scouted by Sagebrush Productions. 700+ live performances before ~100,000 people across 60+ countries. Grammy-recommended artist.
Co-developed The GROOVE Method after reconnecting with David Cowan, who filmed her performance at a Tokyo session in 2010, astonished by her groove.
David Cowan
Advisor & Co-Developer · Berklee College of Music
Associate Professor, Ensemble & Percussion, Berklee College of Music. Drummer, composer, arranger, multi-instrumentalist. US-based.
Touring and recording member of Grammy Award-winning duo Marilyn McCoo & Billy Davis Jr. Main drummer for One Tribe Nation.
Contributes educational design, structural rigor, and global applicability grounded in Berklee’s world-class pedagogical framework.
Now Accepting Applications
Currently in development and verification phase. We are accepting a limited number of early partner applications from production teams and productions in Japan and Africa. A 30–60 minute online meeting to confirm your team’s needs and fit.