Ireland
three equal vertical bands of green (hoist side), white, and
orange; similar to the flag of Cote d'Ivoire, which is shorter and
has the colors reversed - orange (hoist side), white, and green;
also similar to the flag of Italy, which is shorter and has colors
of green (hoist side), white, and red
Isle of Man
red with the Three Legs of Man emblem (Trinacria), in
the center; the three legs are joined at the thigh and bent at the
knee; in order to have the toes pointing clockwise on both sides of
the flag, a two-sided emblem is used
Israel
white with a blue hexagram (six-pointed linear star) known as
the Magen David (Shield of David) centered between two equal
horizontal blue bands near the top and bottom edges of the flag
Italy
three equal vertical bands of green (hoist side), white, and
red; similar to the flag of Ireland, which is longer and is green
(hoist side), white, and orange; also similar to the flag of the
Cote d'Ivoire, which has the colors reversed - orange (hoist side),
white, and green
note: inspired by the French flag brought to Italy by Napoleon in
1797
Jamaica
diagonal yellow cross divides the flag into four triangles -
green (top and bottom) and black (hoist side and outer side)
Jan Mayen
the flag of Norway is used
Japan
white with a large red disk (representing the sun without
rays) in the center
Jarvis Island
the flag of the US is used
Jersey
white with a diagonal red cross extending to the corners of
the flag; in the upper quadrant, surmounted by a yellow crown, a red
shield with the three lions of England in yellow
Johnston Atoll
the flag of the US is used