Business
Bringing out the abilities everyone already has.
As 8vaLabos, we build ability-development apps based on the theory of music producer Koji Yamada. A sense of pitch is not only about music. It is about how people communicate with one another.
Ability-development apps
Our main app is 8va Relative Pitch Training. By listening to a base note and singing do-re-mi, you tune the piano in your brain.
See the app overviewOur Work
8va Relative Pitch Training
8va 相対音感トレーニング · Released March 2026
A relative pitch training app that tunes the piano in your brain. Just listen to a base note and sing do-re-mi. It runs in the browser on smartphones and computers, with no sign-up required.
- Each round
- Listen to the base note, sing do-re-mi-fa-sol-la-ti-do along with the guide, and get scored on the spot (about 13 seconds per round)
- Modes
- Random Base Note / Continuous Challenge / 12-Tone Scale / Ultimate Brain Training
- Scoring
- Measures how far each of the 8 notes is off, and grades you on six levels: S, A, B, C, D and E
- Goal
- A steady S in both the ascending and descending 12-Tone Scale (a fully tuned piano in your brain)
- Devices
- iPhone, Android and computers
Some Android devices may not work properly. - Language
- Japanese
Our Philosophy
Seeing every field through resonance
Koji Yamada’s theory, Seiri Sugaku (physiological mathematics), sees the body and the natural world as sharing the same structure. It reads every field through resonance: not only music, but also voice, language, the mind and body, relationships and even numbers. The six topics below are entry points we have written about on note (in Japanese).
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Pitch
Being tone-deaf is not a matter of talent
Not being able to hit a note is a matter of how you use your brain. When the right brain joins the left, you can use all 12 keys instead of only 7.
Read on note (Japanese) -
Voice
The resonance of your voice depends on the balance of your brain
Your voice travels deep through the brain before it reaches your throat. There are four main ways to arrange notes into a scale, and each one brings out a different state of the brain.
Read on note (Japanese) -
Language
Japanese makes the body’s eight levels resonate
Seiri Sugaku sees the body as having eight thinking layers stacked from bottom to top: three in the gut and five in the brain. Each of the five vowels resonates at a different level, and speaking Japanese naturally brings changes in pitch to all eight.
Read on note (Japanese) -
Mind and body
Seeing mental and physical discomfort as vibration
Seiri Sugaku looks at the true nature of things not as shapes but as vibration. When you hold on to worries, the mechanism that tightens the gaps between cells (tight junctions) tightens inside the brain as well, beyond its original role. You can loosen it yourself by singing all twelve notes evenly with your own voice.
Read on note (Japanese) -
Relationships
What a sense of pitch changes is your relationships
When we listen to someone’s voice, two things happen in the brain: translation and resonance. Resonance only happens in both directions.
Read on note (Japanese) -
Numbers
Ternary, beyond binary
Computers describe the world in binary, as 0 or 1. In his new book 3-Shinsū e no Michi (“The Road to Ternary,” Hikaruland, 2026), Koji Yamada shows the world of ternary that lies beyond it.
Read on note (Japanese)
Company Profile
- Company name
- Shinkokigyou Limited Company
新興企業有限会社 - Representative
- Isao Kiyokawa
- Address
- 3-13 Isogo, Isogo-ku, Yokohama-shi, Kanagawa 235-0016, Japan
- Capital
- 5 million yen
- Business
- Planning, development and operation of ability-development apps; sharing ideas on pitch, voice and communication (8vaLabos)
- 8vaLabos launched
- April 2025
- Contact
- info@8va.shinkogroupk.com
Contact
Please contact us by email.