縁日

The only grounded evidence is a brief announcement saying that there is an ennichi, or festival-style fair, taking place despite it being a weekday. That confirms some kind of event activity at the venue, but not a specific DJ format, music direction, or lineup. For that reason, the safest editorial treatment is to keep it minimal and avoid inferring more than a weekday fair-like gathering.

ConceptThe event itself is confirmed, but the available evidence does not support reconstructing it as a detailed music event.