According to the certification of the Japan Memorial Day Association on July 21, 2017, July 22 of each year was established as the " Day of the Sea King." If this was One Piece's anniversary, the 24th anniversary would be July 22, 2023.
The reference material did not mention any specific activities or content of special significance related to One Piece's 15th anniversary, so it was impossible to answer accurately.
" King of Voyages " was first broadcasted on October 20, 1999, and October 20, 2019 was its 20th anniversary. The anime was adapted from a shonen manga of the same name drawn by Japanese manga artist Oda Eichiro. The manga was published in 1997 in Weekly Shonen Jump. On the 20th anniversary, the animation team released a movie version of " Operation Fever " as a memento. This movie was regarded as a masterpiece by many fans. It included the appearance of many previous characters and aroused the feelings of fans.
According to the information on June 24, 2024, which mentioned the 20th anniversary of One Piece, it could be inferred that the 20th anniversary of One Piece was in 2024.
One Piece's 25th anniversary animation was called One Piece Fan Letter. The animation was produced by Toei. Megumi Ishiya, Kozo Sen, and a group of young animators spent nearly a year creating it. The story was taken from the original chapter of the Chambord Islands. Two years after Luffy lost his brother, Ace, in the war, Luffy and his gang reunited to "resurrect", but the perspective was changed to that of a small fan of Nami. This was a short film for fans. It contained a variety of elements to take care of different types of fans, such as the funny plot to take care of the girl's heart, the combat fans, the CP fans, etc. It also showed a coldness that had never been seen before. It was a world of pirates that was flustered, desperate, and from the perspective of a small character. The theme song was 'We Go'! A gang of straw hats ver. The plot focused on the people who did not pursue One Piece. From their point of view, it depicted the group drama where the straw hats gathered again.
On the 20th anniversary of One Piece's comic series, the officials released the sixth popularity poll for the characters. Luffy won the championship with 117372 votes, and Sauron also received a high number of votes. However, what was more surprising was that Hawkeye did not appear in the top 100. At the same time, a character that was not remembered by many fans broke into the top 50. The top 20 characters were all popular characters that the public was familiar with. Although the overall results might be different from the public's expectations, it was more reliable.
One Piece's 20th anniversary special episode was broadcast on October 20, 2019, but no one could find out which episode it was.
The 25th anniversary of One Piece had a number of special programs and activities: - On March 28, 2024, the special program "All Night Nippon Gold~ 25th anniversary of anime" was broadcasted on "All Night Japan." - On April 7, 2024 (Sunday) 25:00 - 25:30 (April 8, 1:00 - 1:30 Japan time), the special program "Space of the Grass Hat" will be broadcast. After that, it will be broadcast every Sunday 25:00 - 25:30 (Monday 1:00 - 1:30 Japan time). - On October 20, 2024, a special edition of 'One Piece Fan Letter'.
One Piece's 25th anniversary animation was called One Piece FAN LETTE, and the theme song was "We Go!" A bunch of straw hats. The storyline was set two years after the pirate Luffy lost his brother Ace to the war on the top of the mountain. The location was the Xiapodi Islands. The protagonist was a young girl who was full of longing for Nami. She began a small adventure. The work focused on the people who did not pursue One Piece. From their perspective, it depicted the group drama of the straw hat gang reuniting.