Tobi trousers

Tobi trousers or tobi pants are a type of baggy pants used as a common uniform of tobi shokunin, construction workers in Japan who work on high places (such as scaffolding and skyscrapers). The pants are baggy to a point below the knees, abruptly narrowing at the calves so as to be put into the footwear: high boots or Jika-tabi (tabi-style boots), often brightly colored.

According to a spokesperson for Toraichi, a major manufacturer of worker's clothes of this style, the style was developed from knickerbockers. The regular knickerbocker-style pants are called nikka zubon ("zubon" means "trousers," and "nikka" or "nikka-bokka" is a gairaigo-transformation of the word "knickerbockers"). The excessively widened ones are called chocho zubon. This style has also entered popular fashion, as evidenced by the emergence of toramani ("Toraichi maniacs"), die-hard fans of Toraichi trousers.