question: Was M0 a Japanese executive producer of M1 , M2 , and M3
query: SELECT count(*) WHERE {
  M0 ns:film.producer.films_executive_produced M1 .
  M0 ns:film.producer.films_executive_produced M2 .
  M0 ns:film.producer.films_executive_produced M3 .
  M0 ns:people.person.nationality ns:m.03_3d
  }