The Sanix World Rugby Youth Invitational Tournament is an international rugby union tournament for 15-a-side youth teams which is held every year during the Golden Week holidays (29 April – 5/6 May) in Fukuoka prefecture, Japan.

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.

Three or four of the Japanese teams are from the local area Kyūshū, where high school rugby is particularly strong.

However Dollar Academy has participated twice as Scotland's sole representative so far in the tournament in 2000 and 2004, and George Watson's College Pipe Band, Edinburgh have played both the opening and closing ceremonies from 2008 to date.

One Italian team (Istituto Casteller) took part in 2002, and Carmarthenshire College from Wales has also participated.