Agree w Dr. Baker. see: https://www.organicfacts.net/health-benefits/vegetable/health-benefits-of-wasabi.html.
Many benefits but... Wasabi is a cousin of horseradish. More info is available on the benefits of horseradish, but the vast majority of "wasabi" served in the us is actually horseradish (see https://en.Wikipedia.Org/wiki/wasabi). It helps detoxify carcinogens, is anti-inflammatory, an antibiotic, immune-booster, bronchodilator, heart tonic etc. See http://news.Softpedia.Com/news/benefits-from-horseradish-28911.Shtml.