The prefecture of Wakayama, just south of Osaka, plans to make a reef out of natural stones and shaped like a boomerang, which would produce waves of up to 1.5 meters to 2 meters (6.6 feet).

• 大阪南方和歌山的地方官员计画以天然石头做出迴力棒形状的人造礁，其将能产生最高一点五至两公尺（六点六呎）的波浪。