They use about 100 soroban wooden pallets (ソロバン) made of Japanese oak tree, a hard wood. Each weighs 20 kg.

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Filename:	ir065-20190503-2253.jpg
Album name:	philbert / Hitachi-Otsu Ofune Matsuri Boat Festival 常陸大津の御船祭
Keywords:	ibaraki / kitaibaraki / ofune / matsuri / boat / festival
Filesize:	35 KiB
Date added:	Jun 03, 2019
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