A nighttime event is being held where participants will pose as ninja from historic areas. These areas, Iga and Koka in west Japan, are considered the birthplaces of ninja. The event will feature a staged battle.

Participants will number around 100, all posing as ninja. The event is described as historic, suggesting it may be a unique or significant occurrence.

Further details about the event, including its purpose and any related activities, are available from the source. The event is taking place at a park.