Bo taoshi By marioruiz80789798798 Jan 1, 1890 Different sports that will later create Botaoshi Jan 1, 1929 Botaoshi entered in the Kaisei sport festival Jan 1, 1954 First Botaoshi game at the Air defense academy Jan 1, 1973 Rule change (pole lower than 30º --- lower than 45º) Period: Jan 1, 1980 to Jan 1, 1990 Schools stopped organising Botaoshi due to educational reasons Jan 1, 1984 Big accident Jan 1, 2008 Underwater Botaoshi