 Wind gusts in Okinawa reached 115 km / h ( 72 mph ) , while on the volcanic island of Hachijō @-@ jima , gusts reached 214 km / h ( 133 mph ) . On the Japanese mainland , winds gusted to 126 km / h ( 78 mph ) at Chōshi , Chiba . Choi @-@ wan dropped heavy rainfall while near Japan , peaking at 316 mm ( 12 @.@ 4 in ) on Miyake @-@ jima . In Okinawa , Choi @-@ wan flooded a boat , forcing its occupants to be rescued by the Coast Guard . Also on the island , heavy rainfall caused landslides and flooded houses . In Amami Ōshima , the storm left 10 @,@ 810 people without power . On Hachijō , wind gusts of 214 km / h ( 133 mph ) damaged about 200 houses . Nationwide , Choi @-@ wan destroyed 191 homes , injured 9 people , and left about ¥ 300 million ( JPY , $ 2 @.@ 5 million USD ) . 
