Ninjas were known as spies and assassins with special skills who thrived from the Heian period through the Sengoku period, and even into the Edo period. They were responsible for covert missions such as information gathering, assassination, and sabotage. The most famous ninja regions are Iga (present-day Mie Prefecture) and Kōga (present-day Shiga Prefecture). Ninjas employed a unique martial art known as ninjutsu and various tools known as ninja tools (like shurikens and kunai) in their operations.

Ninjas, with their unique skill set, attire, and mysterious way of life, are incredibly popular abroad. Their characters are featured in various media, including movies, TV shows, comics, and games. Particularly, the manga "NARUTO" has continuously attracted a new generation of fans.

The distinctive costume worn by ninjas is designed to aid in covert operations at night or in the dark. It is believed that their black or dark-colored attire was suitable for inconspicuous movement in dark places. However, there's a debate among scholars about whether ninjas always wore black. Some suggest they often disguised themselves wearing common peasant clothes. Female ninjas, known as kunoichi, gathered information and carried out assassinations differently from their male counterparts.

Japan offers several facilities where tourists and locals interested can experience the techniques and culture of ninjas.

• Iga-ryu Ninja Museum (Mie Prefecture): Displays the history, lifestyle, and tools of ninjas. You can also tour an actual ninja residence.
  ▪️Iga-ryu Ninja Museum: https://www.iganinja.jp/?page_id=837

• Ninja Cafes in Tokyo: There are restaurants and cafes in Tokyo where you can enjoy the world of ninjas.
  ▪️Ninja Experience Cafe: https://ninja-cafe.com/en/

• Ninja Villages: There are theme parks, such as those in Nikko, Kyoto, and Ureshino in Saga Prefecture, where you can experience being a ninja. You can learn ninja techniques and take photos in ninja attire.　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　▪️Nikko Edo Village: http://edowonderland.net/en/　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　▪️Toei Uzumasa Eigamura: https://global.toei-eigamura.com/　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　▪️Original Ninja Village Hizen Yumekaido: https://www.hizenyumekaidou.info/en/

Ninjas hold a special place in Japanese history and culture. The term "ninja" means "one who acts covertly" or "one who endures," representing their unique actions and techniques. Their unique skills, knowledge, and presence have continuously influenced many stories, movies, and animations. Pursuing knowledge or experiences related to ninjas will deepen our understanding of Japanese history, culture, and its unique philosophy. Even today, their influence remains undiminished, alive in our entertainment and daily lives.