「一気通貫」はなぜビジネス日本語になったのか

ビジネス日本語講座 · Aug 25, 2026 · 7m

What does ikki-tsūkan (一気通貫) mean in Japanese business? Originally a mahjong term, it has become a common expression in Japanese companies, describing a process handled continuously from beginning to end. You might hear phrases such as “supporting clients from planning to operations” or “managing everything from recruitment to employee retention.” In this episode, I explain the meaning and origins of ikki-tsūkan, why this particular mahjong term fits business so well, and how to use it naturally at work. For advanced Japanese learners, understanding expressions like this offers a fascinating…