いっきかせい

  1. adverb (fukushi), noun (common) (futsuumeishi)

    finishing writing, work, etc. at a stroke (stretch), knocking something off without a break
    yojijukugo

    • 彼、一気呵成に書き上げたと言ってたけど、この提案書、少し雑だね。
      He said he dashed this proposal off in one sitting. It's pretty sloppy.