Courtesy of Yumi Kida in Shikijima, Gunma Prefecture, Japan. A formal POW (Pool Open Water) competition was conducted in Shikijima in Saitama, Japan last weekend (インドアオープンウォータースイミングin敷島 or Indoor Open Water Swimming in Shikijima). Each rectangular loop was 100m in the 50m indoor pool with many of Japan's best open water swimmers taking part in the 500m,