Japan's National Diet is composed of two parallel houses, the House of Councillors and the House of Representatives.
yuki産、こんばんは。
元々坂本龍馬がイギリスの政体をイメージにして考えた[制度](https://eikaiwa.dmm.com/uknow/questions/46213/)ですよね。
衆議院 = House of Representatives
[参議院](https://eikaiwa.dmm.com/uknow/questions/72496/)= House of Councillors
Yukiさんの上記に書いた全てを英訳にしたいなら〜
The other day following a natural disaster the Diet met for an emergency session. However, rather than simply focus on the relief effort, they used the occasion as an opportunity to slip by new legislation to expand the number of seats in the House of Councillors by 8 seats. When the number of seats has remained unchanged up till now, is it really appropriate or necessary to do so during a period of national emergency？ I would prefer to see the government reallocate the funds it takes to run the Diet for 6 years and use the money for the swift recovery of the affected areas.
ご参考になれば幸いです。
Japan has lower and upper houses in its National Diet; the House of Representatives, and the House of Councillors
英文構成としては、A has Bというシンプルなもので、あとは単語の問題だと思います。例えば[国会](https://eikaiwa.dmm.com/uknow/questions/39441/)はthe National Dietと言いますし、衆議院はthe House of Representatives、[参議院](https://eikaiwa.dmm.com/uknow/questions/72496/)はthe House of Councillorsです。下記、DMM英会話スタッフの方のように最初に２つの院政がありますよと示すのも英語独特の表現です。ざきやまが使っている「; (セミコロン)」は、補足説明つまり最初にシンプルに言った分、後で説明するための記号です。
アメリカ合衆国 
日本 
