National Anime Day circulates widely on April 15 across fan communities and listing sites, and the streaming and merchandise company Crunchyroll now marks the date with a one-day store promotion. Aggregators variously credit the date to an anime convention's founding or to Osamu Tezuka's birthday, and neither is supported; no documented founder or establishing record exists.
A four-minute short, lost for ninety years
One of the oldest surviving Japanese animated films is a 1917 silent short called Namakura Gatana, or The Dull Sword. It runs about four minutes and follows a foolish ronin who buys a blade that turns out to be worthless.
The print vanished for decades and was found again in an Osaka antique shop in 2008. The medium is older than most of its fans realize.


