$39 Japan Flag Pack 3D model by dragosburian. Available on CGTrader with 10000 polys and 10000 vertices. Check it out on CGHub.
BLEND (Blender, filesize: 33.4 MB), OBJ (OBJ, filesize: 10.8 MB), FBX (Autodesk FBX, filesize: 53.9 MB), DAE (Collada, filesize: 12.1 MB), STL (Stereolithography, filesize: 3.12 MB)