from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. the functionaries whose tasks include building the dohyo, making announcements, singing the shikona of each rikishi and advising them of preparation time
A new dohyō is built prior to each tournament by the yobidashi, who are responsible for this activity.
The yobidashi also build the dohyō for training stables and sumo touring events.
The yobidashi ensure it is clean of any previous marks immediately prior to each bout.