The Laughing Salesman (Warau Salesman) was originally serialized in Shogakukan's Big Comic as Kuroi Salesman. It was forced moved to Jitsugyo no Nihon Sha's Manga Sunday after the manga was deemed too scary for the publisher.
The Laughing Salesman
In 1989, the name was changed to The Laughing Salesman (Warau Salesman) that we know today.
In 1999, a live action adaptation was aired in June 26, 1999 to September 18, 1999, for total of 10 episodes.