Geography of Japan
Extreme points

Heading
Location
Prefecture
Bordering entity
Coordinates
Ref
North (disputed)
Cape Kamoiwakka on Etorofu
Hokkaido
Sea of Okhotsk
45°33′26″N 148°45′09″E / 45.55722°N 148.75250°E
-
North (undisputed)
Benten-jima
Hokkaidō
La Pérouse Strait
45°31′38″N 141°55′06″E / 45.52722°N 141.91833°E
-
South
Okinotorishima
Tokyo
Philippine Sea
20°25′31″N 136°04′11″E / 20.42528°N 136.06972°E
-
East
Minami Torishima
Tokyo
Pacific Ocean
24°16′59″N 153°59′11″E / 24.28306°N 153.98639°E
-
West
Yonaguni
Okinawa
East China Sea
24°26′58″N 122°56′01″E / 24.44944°N 122.93361°E
The westernmost Monument of Japan

Question: What are the undisputed latitude and longitude ranges of Japan?
Answer: Japan extends from 20° to 45° north longitude (Okinotorishima to Benten-jima) and from 122° to 153° east latitude (Yonaguni to Minami Torishima).