大東群島
The Izu Islands dialects of Hachijō are classified into eight groups according to the various historical villages within Hachijō Subprefecture. On Hachijō-jima, these are Ōkagō, Mitsune, Nakanogō, Kashitate, and Sueyoshi; on Hachijō-kojima, these were Utsuki and Toriuchi; and the village of Aogashima is its own group. The dialects of Ōkagō and Mitsune are very similar, as are those of Nakanogō and Kashitate, while the Aogashima and Sueyoshi dialects are distinct from these two groups. The Utsuki and Toriuchi dialects have not been subcategorized within Hachijō, though the Toriuchi dialect has been noted to be very similar to the Ōkagō dialect in phonology. The dialect(s) of the Daitō Islands also remain uncategorized.