股間

1. Origins, structure, and basic meaning

• Structure: 股間 (こかん) is the groin area between the thighs. It appears as an injured area guarded by a person and as the coverage limit of protective equipment.
• Basic usage: A fallen athlete protects the groin while rising; equipment is checked to ensure that it covers the area.

2. Common pitfalls and similar expressions

• Body area guarded after a fall and limit that protective gear must cover
  • 股間をかばう is the athlete's protective action, while 股間まで覆う states how far the equipment reaches. Do not confuse the body area with the protective gear.