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Central Asia
Commonly understood as comprising Kazakhstan, Uzbekistan, Tajikistan, Turkmenistan, Kyrgyzstan. (Wikipedia)
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East Asia
Commonly understood as comprising China, Hong Kong, Macau, North Korea, South Korea, Japan, Taiwan, Mongolia. (Wikipedia)
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South Asia
Commonly understood as comprising Afghanistan, Pakistan, India, Maldives, Sri Lanka, Nepal, Bhutan, Bangladesh. A common approximate synonym for South Asia is the Indian subcontinent, plus Afghanistan. (Wikipedia)
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Southeast Asia
Commonly understood as comprising Brunei, Cambodia, Indonesia, Laos, Malaysia, Myanmar, The Philippines, Singapore, Thailand, Timor-Leste, Vietnam. (Wikipedia)
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Western Asia (or Southwestern Asia, or Middle East minus Egypt)
Commonly understood as comprising[19] Armenia, Azerbaijan, Bahrain, Georgia, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, the Gaza Strip, Oman, Qatar, Saudi Arabia, Syria, Turkey, United Arab Emirates, Yemen, Cyprus. (Wikipedia)
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North Asia
Commonly understood as comprising eastern Russia. (Wikipedia)