This is a list of countries by easternmost point on land (dependent territories included).
Russia, Fiji, and Antarctica are notable exceptions because the 180th meridian passes through them.
For countries like Russia, New Zealand, Fiji, the United States, and Kiribati, which have territories on both sides of the 180th meridian, the easternmost point is defined as the easternmost point in the direction of travel.
The United States and Kiribati have most of their territory east of the 180th meridian, in the Western Hemisphere, so they are considered to belong to the westernmost countries with their territory stretching as far to the west as beyond the 180th meridian into the Eastern Hemisphere.
Conversely, Russia, New Zealand, and Fiji have most of their territory west of the 180th meridian, in the Eastern Hemisphere, so they are considered to belong to the easternmost countries with their territory stretching as far to the east as beyond the 180th meridian into the Western Hemisphere.