Yahoo! JAPAN

2023/2/24 -Collect all the green swords in Ninjago: Ninja Day game. Don't stop running, and avoid all of the obstacles by jumping and sliding your way ...

Ninja Burger (忍者バーガー) is a parody website started in late 1999, purporting that a sect of noble ninja have taken to secretly delivering fast food ...

International Ninja Day recognizes the fascination associated with the history and pop culture of the ninja.

Brought to you by Ninja Burger, Askaninja.com, the letter N, the number Death, and 40 billion ninjas.

2016/3/3 -Ninja Day in Japan—not to be confused with International Ninja Day, which is on December 5—is celebrated on February 22.

International Ninja Day. Stealthily slip into black attire to channel your inner ancient warrior, gather your gang of like-minded spies and binge some classic ...

2012/3/20 -This day starts you out inside simulation machine. You can get injured and die from the simulations, so don't think everything is sunshine ...

Every year, December 5th is the Day of the Ninja. Plague your co-workers with ninja-ness and wear a ninja mask to work! Got the day off? Run wild in the streets ...