Single crystalline nitrogen and sulfur doped anatase TiO₂ bipyramidal nanoparticles were synthesized by a hydrothermal reaction on titanate nanotubes. The surface of these nanoparticles was oriented to the (101) face. The (101) face of anatase consists of bridged-site oxygen ions, which is very reactive for photoinduced hydrophilic conversion. These nanoparticles were highly dispersed in water, and thin films were coated by a facile spin-coating method using colloidal solution of nanoparticles. The crystal face of thin films was oriented to the (101) direction perpendicular to substrates. Thin films of these nanoparticles on the WO₃ layer exhibited super-hydrophilic conversion under visible light illumination. The observed highly hydrophilic conversion was due to the visible light absorption and the crystal orientation of the bipyramidal TiO₂ nanoparticles. Spin-coating method is an economical coating for large areas, and thin films in the present study have potential in applications on indoor products that possess antifogging and self-cleaning properties.