is a traditional Japan

Japan

Japan is an island nation in East Asia. Located in the Pacific Ocean, it lies to the east of the Sea of Japan, China, North Korea, South Korea and Russia, stretching from the Sea of Okhotsk in the north to the East China Sea and Taiwan in the south...

ese game that involves splitting a watermelon

Watermelon

Watermelon is a vine-like flowering plant originally from southern Africa. Its fruit, which is also called watermelon, is a special kind referred to by botanists as a pepo, a berry which has a thick rind and fleshy center...

 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.
The rules are similar to piñata

Piñata

A piñata is a papier-mâché or other type of container that is decorated, filled with toys and or candy and then broken as part of a ceremony or celebration. Piñatas are most commonly associated with Mexico, but its origins are considered to be in China...

. A watermelon is laid out, sometimes on a tarp, and participants one by one attempt to smash it open. Each is blindfolded, spun around three times, and handed a wooden stick, or bokken

Bokken

A bokken , "wood", and ken, "sword") , is a Japanese wooden sword used for training. It is usually the size and shape of a katana, but is sometimes shaped like other swords, such as the wakizashi and tantō...

, to strike with. The first to crack the watermelon open wins. Afterwards the chunks of watermelon produced are shared among participants.