High Quality Content by WIKIPEDIA articles! The Sanix World Rugby Youth Invitational Tournament is a prestigious international rugby union tournament for 15-a-side youth teams which is held every year during the Golden Week holidays (April 29 - May 5th/6th) in Fukuoka prefecture, Japan. Participation is by invitation only, and the overseas schools selected by their respective unions to represent their country are generally expected to be of a high standard and among the top five in each country. The event is hosted by the Japan Rugby Football Union and supported by various local bodies including the Kyushu RFU, the Sanix Sports Foundation and Munakata City.