We propose static polarized SANS measurements on magnetically and sterically anisotropic Janus nanoparticles in an applied magnetic field of up to 5 T. The aim of the experiment is to quantitatively investigate the impact of shape anisotropy and exchange bias (induced by interaction of the FePt and MnO subunits of the hetero-dimers) on the spatial magnetization distribution in these nanoparticles. As a result, we expect to gain precise information on the impact of exchange interactions on the surface spin canting and thus also the magnetic anisotropy in Janus nanoparticles. The proposed experiments are crucial for the understanding of the magnetization relaxation in such anisotropic nano-hetero-particles currently under investigation.