Holographic data storage (HDS) is a next-generation optical storage that uses the principles of holography. HDS recording density is potentially greater than that of a conventional optical disk. The multiplex holographic recording method is an important factor that affects the recording capacity of this storage. In this study, we focus on shift multiplexing with spherical waves and examined the possibility of high-density recording using this method. Since a spherical wave can be regarded in some locations as overlapping plane waves advancing in different directions, the shape of the diffraction grating recorded as a hologram is a function of the location in the recording medium. Therefore, multiplex recording is enabled in this system by simply displacing the recording medium. We propose a method of shift multiplex recording that combines the in-plane direction and depth direction of the recording medium. By focusing on the fact that shift selectivity is also in the depth direction, we examined the possibility of a multiplex recording method that combines multiple shift directions. We report on numerical and experimental evaluation results of our high-density recording and reproduction system based on this principle.