圏

Greater Tokyo Metropolitan area

inside (a region, area, etc.)

Arctic Circle

stratosphere

outside (a region, area, etc.)

within Earth's atmosphere

the atmosphere

Tokyo area (esp. in ref. to Tokyo, Kanagawa, Saitama and Chiba)

gravitational field (of a celestial body)

circle of fifths

greater metropolitan area

mesosphere

public sphere

outside Earth's atmosphere

great circle

great circle route

cultural sphere

safety zone

urban area

within the sphere of influence (of)

outer atmosphere

gravitational sphere (of a celestial body)

sinophone world

Kantō area

home range

(having a) good chance of being elected

hour circle

communist bloc

atmosphere

hydrosphere

out of the range of communication

scoring position

hydrospheric sciences

troposphere

Soviet bloc

former Soviet bloc

tropopause

one's daily milieu

traffic area

Kansai area

emphasis mark (used in Japanese text in a way similar to underlining)

biosphere

center versus periphery theory

control zone

economic bloc

harm zone

sphere of influence

English-speaking world

category theory

tropopause

sphere (e.g. of knowledge, influence)

beneficiary zone

Greater China (incl. Hong Kong, Macao, Taiwan and sometimes Singapore)

business region

great circle sailing route

lithosphere

Spanish-speaking world

French-speaking world

German-speaking countries

Lebensraum

Antarctic Circle

cirque

member states of the former Soviet bloc

within walking distance

co-prosperity sphere

non-English-speaking world

relegation zone

asthenosphere

atmospheric nuclear test

biosphere reserve (UNESCO)

air defense identification zone

locale-specific behavior

polar circle

ionosphere

transient luminous event

rhizosphere

lithosphere

polar mesospheric clouds

Chinese-character cultural sphere

storm zone

(within) walking distance

stratoplane (hypothetical type of airplane)

sphere of influence

Greater East Asia Co-Prosperity Sphere

thermosphere

substratosphere

magnetosphere

sphere

eurozone

Islamic world

countries that do not use Chinese characters in their writing

countries where Chinese characters are used or were historically used

vertical circle

polar stratospheric cloud

wider Kinki region (Osaka, Kyoto, Nara, Shiga, Wakayama and Fukui prefectures)

vertical circle

Coordination Committee on Multilateral Export Controls

cryosphere