What is the Harmonic System?

The most important implementation of the Universal Unit System (UUS): a layer designed so that key physical and astronomical constants approximate multiples or submultiples of integer powers of twelve.

How does it relate to SI?

UUS is designed to coexist with SI, not replace it. SI conversion factors are stable since the 2019 SI redefinition and unaffected by CODATA adjustments.

Universal Unit System (UUS) / Harmonic System

A dozenal-based structural unit system
as a structure identified by Takashi Suga

Overview

The official entry point for the Universal Unit System (UUS) and its specific realization, the Harmonic System — a structurally compressed, dozenal-based framework linking physical constants, Earth-local scales, and calendar symmetry

This site includes formal papers, executable specifications, interactive diagrams, a cross-linked glossary, machine-readable resources, and AI-oriented documentation. The main README and the sections below provide entry points to the evolving collection.

For the concise introduction for newcomers, see the main README:

Main README.md

Main Documents

AI-Oriented Resources

FAQ

External Links

Original asahi-net site (2002–2026) - (English, Japanese)
Online Converter
Blog Posts (English)

External References to This Project

Twelve-digit numeral systems and historical discussions:
Wikipedia: Duodecimal – note 37 (citing revised.pdf)

Natural Time Scale — dozenal-based temporal hierarchy

About

Takashi Suga (Dr.), the maintainer of this project, is an independent researcher based in Japan, specializing in unit system design, calendrical studies, and mathematical structures in physical constants. As summarized on Research Portal, his work is published on Academia.edu and maintained on GitHub.

Repository

GitHub: https://github.com/suchowan/a_converter - (commit history - Last updated: July 17, 2026)