Japan coach Jamie Joseph has named 10 uncapped players in his 37-man squad for internationals against Australia, Ireland, Portugal and Scotland.
The Exeter Chiefs hooker could miss the Guinness Six Nations opener against France in Paris on Sunday after departing the Algarve on Tuesday night.
Anthony Alvès Loosehead Prop 
Cleber Dias Flanker 7 
David Costa Hooker 
Diogo Ferreira Prop 
Duarte Diniz Openside Flanker 
Duarte Torgal Lock 4 
Eric dos Santos Madeira Blindside Flanker 
Francisco Fernandes Loosehead Prop 
Francisco Sousa Lock 4 
Geoffrey Moise Prop 
Joao Granate Blindside Flanker 
Jose Madeira Openside Flanker 
Jose Rebelo de Andade Lock 5 
Loic Bournonville Loosehead Prop 
Manuel Picao Number 8 
Mike Tadjer Hooker 
Nuno Mascarenhas Loosehead Prop 
Rafael Simoes Lock 4 
Thibault de Sousa Tighthead Prop 
Portugal 
