shall take place every three years.

Article 47. Electoral districts, method of voting and other
matters pertaining to the method of election of members of both
Houses shall be fixed by law.

Article 48. No person shall be permitted to be a member of
both Houses simultaneously.

Article 49. Members of both Houses shall receive appropriate
annual payment from the national treasury in accordance with law.

Article 50. Except in cases provided by law, members of both
Houses shall be exempt from apprehension while the Diet is in
session, and any members apprehended before the opening of the
session shall be freed during the term of the session upon demand
of the House.

Article 51. Members of both Houses shall not be held liable
outside the House for speeches, debates or votes cast inside the
House.

Article 52. An ordinary session of the Diet shall be
convoked once per year.

Article 53. The Cabinet may determine to convoke
extraordinary sessions of the Diet. When a quarter or more of the
total members of either house makes the demand, the Cabinet must
determine on such convocation.