| 生物界 | life |
| 斯界 | this field or subject |
| 臨界点 | critical point (temperature) |
| 界磁極 | field pole |
| 下界 | lower bound |
| 苦界に身を沈める | to become a prostitute (sink into a brothel) |
| 古生界 | Paleozoic group |
| 政界の嵐 | political storm |
| 世界銀行 | World Bank |
| 世界交通の衝 | focus of the trade routes of the world |
| 世界新 | new world record |
| 粒界 | grain boundary |
| 液性限界 | liquid limit |
| 塑性限界 | plastic limit |
| 可能世界モデル | possible-world model |
| 境界理論 | bounding theory |
| 界面活性剤 | surfactant |
| 興行界 | entertainment world |
| 実業界 | business world, business circles |
| 世界一周旅行 | round-the-world trip, world cruise |
| 世界記録 | world record, establishing a world record (in) |
| 世界経済 | world economy, international economy |
| 世界情勢 | world situation, world affairs |
| 世界制覇 | domination of the world, world hegemony |
| 世界選手権 | world (an international) championship (title) |
| 世界平和 | world peace, peace of the world |
| 界雷 | frontal thunderstorm |
| 界磁石 | field magnet |
| 界面化学 | surface chemistry |
| 界面活性 | surface active |
| 界面現象 | interfacial phenomenon, surface phenomenon |
| 業界標準 | industry-wide standard |
| 世界気象機関 | World Meteorological Organization (Organisation), WMO |
| 世界記録保持者 | world record holder |
| 世界経済フォーラム | World Economic Forum |
| 世界経済見通し | World Economic Outlook (IMF publication) |
| 世界市場 | global market |
| 世界食糧計画 | World Food Program, WFP |
| 世界知的所有権機関 | World Intellectual Property Organization (Organisation), WIPO |
| 世界的不況 | global recession |
| 世界標準 | global standards |
| 世界不況 | world recession |
| 世界陸上 | World Championships in Athletics |
| 文明世界 | civilized world, civilised world |
| 臨界前核実験 | subcritical nuclear experiment |
| 星界 | star world (SF term) |
| 結界 | short two or three-fold lattice around the front desk of a store |
| 三界流転 | endless cycle of rebirth through the three worlds of past, present, and future existences |
| 電界放出 | field emission (electric) |
| 世界地図 | world map |
| 自由世界 | Free World |
| 政界工作 | currying of political favor, buying political influence |
| 政界再編 | political realignment, a realignment of political parties |
| 政界余聞 | tidbits of political gossip |
| 世界思潮 | main currents (the trend) of thinking in the world |
| 女人結界 | prohibition against women entering a sacred area |
| 法界悋気 | being jealous of things that have nothing to do with one, being jealous of others who are in love with each other |
| 異界 | spirit world, underworld, the next world |
| 回折限界 | diffraction limit |