*Temmu 12/12/13 (684 Jan 5) Officials are dispatched on a land survey, to determine [[provinces of Japan|province]] boundaries.
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*684/5/14 Twenty-three immigrants from [[Paekche]] (including a number of Buddhist priests) settle in [[Musashi province]].
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*684/10/1 The system of ''[[kabane]]'' was modified to include only eight titles.
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*684/10/3 Officials were again dispatched to determine the boundaries of the provinces.
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*684/10/14 A major earthquake struck. Roughly 500,000 ''shiro'' of land in [[Tosa province]] fell into the sea, and a new island emerged in the sea near [[Izu province]].