The Ishigaki island is the main island of the Yaeyama-Islands and situated about 1'000 kilometres offshore from the southernmost point of Kyushu (Okinawa Prefecture). The Mount Omoto at 526 m is the highest mountain on Ishigaki Island.
Japan 2016, Ishigaki Island.
The stamp was issued in the "60th Anniversary of Local Government Law Booklet".
It is showing a view towards Mt. Omoto (526 m) and Fukaiomoto (477,4 m).
The same design is shown as illustration of the stamp sheet "60th Anniversary Series of the Enforcement of the Local Autonomy Okinawa Prefecture" (issued 2012).
more details please see "60th Anniversary Series of the Enforcement of the Local Autonomy Okinawa Prefecture".