The letter sealed inside, dated July 1984, asked whoever found the bottle to bring it back to school, Choshi High School.
The school said in a press release that it released 450 bottles in 1984 and another 300 in 1985 as part of its investigation of ocean currents.
So far, 51 have been found and returned. However, the school added, it is the only bottle found since 2002.
Other bottles of the experiment failed in Washington State in the United States, Canada, the Philippines and the Marshall Islands in the central Pacific.
Mayumi Kanda, a former student of the school, who was a member of the science club in 1984, said she was surprised the bottle had reappeared after so long. She said hearing the news “brought back nostalgic memories of my high school years.”
Choshi High School said its students plan to write to Abbie thanking her for returning it.
They said they would include a miniature Tairyo-bata – a type of fisherman’s flag once used to indicate a good move – with the letter as a gift.