KJ Spatial Lab

Frontend & Spatial Systems Engineering.
High-performance 3D experiences on the web.

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Featured Projects

Spatial UX, performance engineering, and real-world 3D systems.

3D Measurement System

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Click-to-measure, raycasting precision, snapping, and label UX in Three.js.

Three.js Raycasting Spatial UX

WebGL Performance Optimization

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Draw calls, instancing, GPU memory budgeting, and profiling strategies.

Performance GPU Profiling

CAD to Web Pipeline

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Large GLB handling, progressive loading, and scalable scene architecture.

glTF/GLB Streaming Architecture

About

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I'm Koji — a frontend & spatial systems engineer based in Japan, focused on high-performance 3D experiences on the web.

I work at the intersection of CAD, WebGL, and product UX — building measurement tools, CAD-to-web pipelines, and the engineering plumbing that makes heavy 3D scenes feel light in a browser.

Stack highlights

  • TypeScript / React / Astro
  • Three.js / Babylon.js
  • glTF / Draco / KTX2
  • three-mesh-bvh / profiling