The Constitution of Japan, 1946 · Japan
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. Article 54. When the House of Representatives is dissolved, there must be a general election of members of the House of Representatives within forty (40) days from the date of dissolution, and the Diet must be convoked within thirty (30) days from the date of the election. (2) When the House of Representatives is dissolved, the House of Councillors is closed at the same time. However, the Cabinet may in time of national emergency convoke the House of Councillors in emergency session. (3) Measures taken at such session as mentioned in the proviso of the preceding paragraph shall be provisional and shall become null and void unless agreed to by the House of Representatives within a period of ten (10) days after the opening of the next session of the Diet. Article 55. Each House shall judge disputes related to qualifications of its members. However, in order to deny a seat to any member, it is necessary to pass a resolution by a majority of two-thirds or more of the members present. Article 56. Business cannot be transacted in either House unless one third or more of total membership is present.
(2) All matters shall be decided, in each House, by a majority of those present, except as elsewhere provided in the Constitution, and in case of a tie, the presiding officer shall decide the issue. Article 57. Deliberation in each House shall be public. However, a secret meeting may be held where a majority of two-thirds or more of those members present passes a resolution therefor. (2) Each House shall keep a record of proceedings. This record shall be published and given general circulation, excepting such parts of proceedings of secret session as may be deemed to require secrecy. (3) Upon demand of one-fifth or more of the members present, votes of the members on any matter shall be recorded in the minutes.
Text from Project Gutenberg, public domain in the United States.