 John Wilhelm and Takeshi Yokota also founded Intrax.Ayusa is a founding member of the Counsel on Standards for International Educational Travel (CSIET) and has received a full listing as an accredited exchange organization for 25 years, since CSIET’s inception.Ayusa matches American host families (in all 50 states) with international high school students between the ages of 15 and 18 years old for an academic year or semester.