到着とうちゃく Common Noun Irregular Intransitive English jmdict 1 noun (common) (futsuumeishi) noun or participle which takes the aux. verb suru intransitive verb arrival その列車は予定どおりに到着した。 The train arrived on schedule.
到着次第とうちゃくしだい Noun Adverb English jmdict 1 noun (common) (futsuumeishi) adverb (fukushi) upon arrival of an item (items);as soon as one arrives