突貫作業

とっかんさぎょう

noun

•

rush work, crash program, working on a crash basis, working at top speed(yojijukugo)

突	stab, protruding, thrust, pierce, prick, collision, sudden
貫	pierce, 8 1/3lbs, penetrate, brace
作	make, production, prepare, build
業	business, vocation, arts, performance

とっかんさぎょう

、

あ

It was a rush job so it might not be a good fit