Quercus miyagii is a species of oak native to the Ryukyu Islands.

[2] It is placed in subgenus Cerris, section Cyclobalanopsis.

[3] A tree typically 12 metres (39 feet) tall, its acorns are consumed by the freshwater crabs Geothelphusa grandiovata and Candidiopotamon okinawense, which gather them and store them in their burrows.

[4]