βOKU NO WAVE — Hokusai × BAKIBAKI × Brainwaves

From an unseen tremor, we raise the next wave

In βOKU NO WAVE (Hokusai × BAKIBAKI ver.), Hokusai's Great Wave is redrawn by a formula derived from your brainwaves. The more you focus, the finer the pattern and the deeper the indigo. Relax, and the sea calms. The lines belong to BAKIBAKI, the street artist whose murals mark the walls of Juso, Osaka. One picture stirs the next. The chain goes on. An interactive exhibition that draws the baki pattern from "my own wave" — your brainwaves.

BAKIBAKI × Masaki Kato × CFK

How it works

Each visitor experiences about three and a half minutes, guided by the sound of waves and narration, through projection mapping on a wall (3450×1600 mm) and three panels
An EEG headband (Muse 2) measures brainwaves and computes relaxation and concentration scores
The swell of the Great Wave moves according to this displacement field:
(Δx, Δy) = A (0.25 sin 2πu + 0.35 crash(u), −e(u)), s = 1 + S max(e(u), 0), u = (t/T + φ) mod 1
The swell amplitude A is set by relaxation, and the wave growth S by peaks of concentration
From the visitor's brainwaves, lines of the baki pattern — drawn with BAKIBAKI's own pattern brush — are generated and run across the wall and all three panels. Finally, a Great Wave drawn in that person's own pattern appears
As a memento, visitors take home a 90 mm coaster laser-engraved with their own line and formula (Δy = −A e(t/T) with their value of A)

The pen plotter mural

On the gallery wall, a pen plotter (NextDraw) drew the Great Wave, the baki pattern, and the Juso skyline every night. One cycle takes about 25 minutes, with 63.7 m of line. Drawn over and over on the same sheet, the lines grow denser day by day.