【口上】PROLOGUE While the West sought "Infinite Proofs",
Edo Japan polished the "Finite Procedure".
"Enri" (Circle Principle) was not a detour.
It was the pride of Wasan: a "Transparent Method" verifiable by anyone.

【小史】HISTORY SEKI Takakazu — The giant of Edo mathematics who reached global standards alone.
His "Enri" was a finite secret technique to trap the circle using polygons, without using infinity.
This machine re-implements his genius into a modern OS by carving his thoughts into the ADIC Ledger.

Even in Enri, the West draws a "Line" approaching Pi, while Wasan sets a "Cage" to trap Pi.

【体験】EXPERIENCE Moving the slider is to re-live the "Procedure".
Truth does not fall from the sky.
It resides only in the "Next Move" of layering polygons.
Wasan is a Threshold-based OS that defines truth as the area determined in finite steps.