Prefecture Map Generator

Seed Generation Type

Patch Generation

Patch Terrain Type

Patch Variant

Right-drag to lasso a freeform patch area.

Display Layers

Show features Show labels

Generated Features

Legend

Prefecture region / municipal border

Main river / tributary

Railway / solid ring railway

National road / trunk ring road

Expressway / environmental ring segment

Premodern / minor road

Prefectural capital / city

Major / regional / fishing / lake port

Castle / ruins

CBD / central city cells

Satellite city

Station

Industry / logistics

New town

Notes

Open index.html with Live Server. Left-drag pans the viewport; right-drag draws a freeform regeneration area; use Patch Generation to write terrain into that area.

Add preferred reusable place names in CUSTOM_NAME_LIST inside names.js.