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Inpainting reconstructs the artwork beneath source text. A precise removal region usually matters more than a larger model.

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Review automatic cleanup

Detection produces a removal mask. Inpainting uses it to create a cleanup layer; without a mask, the stage completes without inference. The pipeline skips inpainting on a page that already has a cleanup layer, so use Remove to inpaint again. Inspect the result at normal reading size and high zoom. Look for glyph fragments, missed punctuation or furigana, erased bubble borders, repeated textures, smeared screentone, and changes outside the lettering.

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Repair a missed region

1

Paint a removal mask

Choose Remove, set the brush diameter, and cover only the source marks that need reconstruction. Use controlled strokes and avoid neighboring line art. Cancel the gesture if the mask is wrong.
2

Let inpainting run

Release the stroke. Koharu runs inpainting for that area at once and merges the result into the page’s cleanup layer. Include enough of each glyph for the model to remove it without covering an entire bubble unnecessarily.
3

Touch up and inspect

Use Color picker, Brush, and Eraser for small deterministic corrections. Check the result again at normal zoom.
Stopping a processing job does not turn its temporary removal mask into visible artwork.

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Choose a model

LaMa and AOT provide direct inpainting. FLUX.2 Klein and RORem Mixed are generative alternatives with prompt controls and larger resource requirements. See vision and inpainting models.
Brush strokes made while the cleanup layer is selected land on that layer, and a later Remove stroke merges into it. Clear the selection before painting to keep manual touch-ups on a separate Paint layer.