土俵

1. Origins, structure, and basic meaning

• Structure: 土俵 (どひょう) is a noun for the ring in which sumo bouts take place.
• Basic usage: It also works figuratively for common ground or equal conditions for comparison, competition, or debate.
  • 力士が土俵に上がると会場が静まった。 — The venue fell silent when the wrestler stepped into the ring.
  • 同じ土俵で競うために条件をそろえた。 — We aligned the conditions so both sides could compete on equal terms.

2. Common pitfalls and similar expressions

• Literal ring and figurative ground
  • 土俵に上がる can describe entering a sumo ring, while 同じ土俵で means competing or comparing on equal terms.