Meaning
際 captures the idea of an edge — the exact point where one thing ends and another begins. In daily Japanese it appears in two senses: a physical margin (the lip of a shoreline, the edge of a window sill) and a situational threshold (a specific moment, occasion, or circumstance).
The kanji is built from two parts. The left radical 阝 (a simplified form of 阜) depicts a stepped hillside, common in kanji relating to terrain and geography. The right component, 祭 (festival, ceremony), derives from the image of a hand offering at an altar. Together they suggest a hillside shrine — a threshold where landscape meets ritual, marking the boundary between ordinary and significant.
With 14 strokes, 際 is taught in Grade 4 of Japanese elementary school. It appears frequently in newspapers, business documents, and academic writing, so N3 learners will encounter it often. Vietnamese learners will recognize it immediately: Hán-Việt TẾ shows up in quốc tế (国際, international) and thực tế (実際, reality).
Readings
On'yomi (音読み) — Chinese-derived readings
サイ is used almost entirely in compound words (熟語, jukugo) and is rarely seen on its own. In compounds it conveys the abstract meanings: occasion, circumstance, and international boundary.
- 国際 (kokusai) — international; literally "between nations/borders"
- 実際 (jissai) — in reality, actually; literally "actual circumstances"
- 交際 (kōsai) — social relations, dating; literally "the meeting of interactions"
- 際限 (saigen) — limit, end, bound
- 分際 (bunzai) — one's place/status (often used critically)
Kun'yomi (訓読み) — Native Japanese readings
きわ is used when 際 appears alone or in native Japanese compounds. It points to something concrete — the physical brink of a cliff, a shoreline, the edge of a table. Figuratively, it extends to thresholds of danger or possibility.
- 際 (kiwa) — edge, verge, brink (standalone noun)
- 窓際 (madogiwa) — by the window, window seat
- 水際 (mizugiwa) — water's edge, shoreline, at the border
- 山際 (yamagiwa) — the edge of a mountain, where hills meet sky
- 際立つ (kiwa-datsu) — to stand out, be conspicuous
- 際どい (kiwadoi) — risky, borderline, precarious
Common Words & Compounds
際 threads through vocabulary from diplomacy to daily life. Here are the main compound groups:
International / Formal Context
- 国際 (kokusai) — international; used in 国際連合 (United Nations), 国際空港 (international airport)
- 国際的 (kokusaiteki) — international (adjective form)
- 国際化 (kokusaika) — internationalization
Reality / Circumstance
- 実際 (jissai) — in reality, actually, in practice
- 実際に (jissai ni) — actually, in fact (adverb)
- 実際的 (jissaiteki) — practical, realistic
Social Relationships
- 交際 (kōsai) — social relations, romantic relationship
- 交際相手 (kōsai aite) — romantic partner
Physical Edges & Spaces
- 窓際 (madogiwa) — beside the window; also used for marginalized employees ("window-seat workers")
- 水際 (mizugiwa) — water's edge; also used in 水際対策 (border control measures)
- 山際 (yamagiwa) — edge of the mountains
- 床際 (tokigiwa) — edge of the bed/floor
Expressions & Grammar
- 際に (sai ni) — at the time of, on the occasion of (grammar pattern: Verb dictionary form + 際に)
- 際限 (saigen) — limit; 際限なく (without limit, endlessly)
Example Sentences
彼女は国際会議で発表した。
Kanojo wa kokusai kaigi de happyō shita.
She gave a presentation at an international conference.
実際に日本に行ってみると、想像とは違った。
Jissai ni Nihon ni itte miru to, sōzō to wa chigatta.
When I actually went to Japan, it was different from what I had imagined.
窓際の席に座ってもいいですか。
Madogiwa no seki ni suwatte mo ii desu ka.
May I sit in the seat by the window?
川の際に立たないでください。危ないですよ。
Kawa no kiwa ni tatanaide kudasai. Abunai desu yo.
Please don't stand at the edge of the river. It's dangerous.
出発の際に、パスポートをご確認ください。
Shuppatsu no sai ni, pasupōto wo go-kakunin kudasai.
Please confirm your passport at the time of departure.
あの選手の技術は際立っている。
Ano senshu no gijutsu wa kiwa-datte iru.
That athlete's skill really stands out.
二人は長年交際した後、結婚した。
Futari wa naganen kōsai shita ato, kekkon shita.
The two of them dated for many years before getting married.
水際で子供たちが遊んでいる。
Mizugiwa de kodomo-tachi ga asonde iru.
The children are playing at the water's edge.
彼の際どい発言が問題になった。
Kare no kiwadoi hatsugen ga mondai ni natta.
His borderline remarks became a problem.
緊急の際には、すぐに係員にお知らせください。
Kinkyū no sai ni wa, sugu ni kakari-in ni o-shirase kudasai.
In case of an emergency, please notify the staff immediately.
Memory Tip
Picture a hillside shrine at the very edge of a cliff. The left radical 阝 is the stepped terrain rising sharply; the right component 祭 is a ceremony at an altar. The kanji plants you at the spot where the hillside ends and the ritual begins — a threshold.
That image covers both readings. きわ: the water's edge (水際), the window ledge (窓際), the brink of a drop. サイ: the moment of departure (出発の際), the space between nations (国際). In either case, you are standing at the edge of something that matters.