A wajū (輪中, lit. 'inside the circle') Japanese pronunciation: [wa(d)ʑɯː] is a hydraulic engineering and flood control structure unique to the alluvial...

The Tatsuta wajū sluice gates (立田輪中人造堰樋門, Tatsuta-wajū jinzōseki-himon) were constructed in 1902 during works on the Kiso River in Yatomi, Aichi Prefecture...

The area located between the two rivers is referred to as the "Waju-tei" (輪中堤 or Waju levee). The name Wanouchi originates from this word and means "the...