際（さい、sai）
- occasion

The Japanese word 際さい primarily functions as a noun that indicates a "time," "occasion," "situation," "circumstance," or "the time of." It often suggests a specific point or period when something happens or a particular situation. It implies a sense of "when," "at the time of," or "on the occasion of." 際さい can also imply that something else is going to happen at the same time.

⚫︎試験の際さい Translation: At the time of the exam/ During the exam. ⚫︎卒業の際さいには、記念品が配られました。 Translation: Memorabilia were distributed at the time of graduation. ⚫︎日本へ行く際さい、着物を買いました。 Translation: I bought a kimono when I went to Japan.

⚫︎ 際さい is often used with the particle の to modify nouns. For example, 試験の際さい (at the time of the exam). ⚫︎ It can be used with various verbs to express the point in time of the action, such as 〜する際さい (when/at the time of doing ~). ⚫︎ The nuance is often formal or polite, suitable for written Japanese or more formal conversations. ⚫︎ 際さいcan connect with clauses or phrases using particles such as に or は, to refine the context.

⚫︎ The word 際さい is most commonly written using the kanji 際さい. ⚫︎ It is always written in hiragana as さい when the kanji is not used. ⚫︎ The okurigana (hiragana attached to kanji) doesn't change.

⚫︎ 時とき (time) ⚫︎ 場合ばあい (case, situation) ⚫︎ 時分じぶん (time, occasion) ⚫︎ 折おり (occasion)

There are no direct antonyms for 際さい, as it is a term that indicates time or a specific point. However, terms that imply "not at that time" or "outside of that occasion" could be considered indirect opposites.

日本へ帰国する際さい、お土産を買います。 ・Translation: I will buy souvenirs when I return to Japan. ・Explanation: This sentence uses 際さい to indicate the time of buying souvenirs, which is when the speaker returns to Japan.

入学の際さい、説明会がありました。 ・Translation: There was an orientation at the time of enrollment. ・Explanation: This sentence expresses that an orientation was held during the enrollment period, marking the time frame with 際さい.

The kanji 際さい is composed of two parts: 氵 (さんずい), which signifies "water" or "related to water," and 祭, which means "festival" or "ceremony". The original meaning was related to ceremonies or important events occurring at a specific time. Over time, it developed to mean a specific time or circumstance in general.