with a large $42\arcmin \times 42\arcmin$ beam, and only a small fraction of the DIRBE data were used to construct the DIRBE ZE model [@Kelsall98; @Wright98]. @Pyo10 also reported an inconsistency of 20% in the intensity of the ring component between the AKARI observations and the Kelsall model prediction in the mid-IR regime. Since the ZE is the nearest source of diffuse emission to the Earth and an important foreground component for studies of Galactic and extragalactic emission at IR wavelengths, it is extremely important to understand the nature of the zodiacal dust cloud, not only for Solar System science. It is crucial to precisely evaluate the contribution of the ZE to the IR sky brightness. The diffuse emission in the far-IR regime is, for instance, a direct measure of the column density of the interstellar dust, and a full-sky far-IR map can also be used as a measure of the extinction for the emission from extragalactic objects. A careful treatment of the ZE is also required for the construction of extinction maps [@SFD98; @FDS99; @Meisner14; @Planck14-11].

We performed an all-sky survey with the AKARI satellite [@Murakami07]. The all-sky far-IR map data have been publicly released [@Doi15]. AKARI covers wavelengths 