馬場

1. Origins, structure, and basic meaning

• Structure: 馬場(ばば) is a noun for a riding ground or track where horses are ridden or trained.
• Basic usage: It marks the place of activity in 馬場で and becomes the topic of ground conditions in 馬場はぬかるんでいる.

2. Common pitfalls and similar expressions

• Scope of the place
  • It names the ground or area used for riding and training, not an individual horse or a stable.
• Place and topic
  • Use で for an action occurring there and は when describing the condition of the riding ground.