Masaru Emoto (?? ?, Emoto Masaru, July 22, 1943 – October 17, 2014) was a Japanese author and pseudoscientist who said that human consciousness has an effect on the molecular structure of water.
Emoto's conjecture evolved over the years, and his early work revolved around pseudoscientific hypotheses that water could react to positive thoughts and words and that polluted water could be cleaned through prayer and positive visualization.Since 1999, Emoto published several volumes of a work entitled Messages from Water, which contain photographs of ice crystals and their accompanying experiments.