Did M3 employ a Japanese actor of M1 and M2 and employ M4 , M5 , and M6
SELECT count(*) WHERE {
?x0 ns:film.actor.film/ns:film.performance.character M1 .
?x0 ns:film.actor.film/ns:film.performance.character M2 .
?x0 ns:people.person.nationality ns:m.03_3d .
M3 ns:business.employer.employees/ns:business.employment_tenure.person ?x0 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person M4 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person M5 .
M3 ns:business.employer.employees/ns:business.employment_tenure.person M6
}