Suikawari (スイカ割り suika-wari, lit. Watermelon Splitting) is a traditional Japanese game that involves splitting a watermelon with a stick while blindfolded. Played in the summertime, suikawari is most often seen at beaches, but also occurs at festivals, picnics, and other summer events.
Suikawari being played on a beach in Japan.
The rules are similar to piñata. A watermelon is laid out, and participants one by one attempt to smash it open. Each is blindfolded, spun around three times, and handed a wooden stick, or bokken, to strike with. The first to crack the watermelon open wins.
Afterwards the chunks of watermelon produced are shared among participants. Because the watermelon can fall into the sand and get dirty, a sheet, a piece of cardboard, or other element is commonly placed beneath it.

the material is taken from