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===Shimanto Group===
The Shimanto Group is a set of metamorphic rocks dated from Early Cretaceous to earliest Miocene which are associated with the Shimanto belt.<ref name=":5" /><ref name=":24">{{cite journal |last1=Ujiie |first1=K. |title=Off-scraping accretionary process under the subduction of young oceanic crust: The Shimanto Belt of Okinawa Island, Ryukyu Arc |journal=Tectonics |date=1997 |volume=16 |issue=2 |pages=305–322 |doi=10.1029/96TC03367|bibcode=1997Tecto..16..305U |s2cid=129383358 |doi-access=free }}</ref> The Shimanto belt is an accretionary complex in the Outer Zone of Southwest Japan which extends from [[Honshu]], [[Shikoku]], and Kyushu to Northern and Central Ryukyu.<ref name=":1" /> The group comprises sedimentary and [[metasedimentary rock]]s metamorphosed up to [[greenschist]] [[metamorphic facies|facies]], including [[flysch]]-type sandstone and slate with mafic greenstones.<ref name=":5" />
Deformations such as northwest-dipping, isoclinal, overturned [[Fold (geology)|folds]] and SE-verging thrust faults can be found in the Shimanto Group of Central and Northern Ryukyu.<ref name=":5" />
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