Unconstitutional ruling - Iken

...In this way, the courts have formed various principles and legal theories for the exercise of the power to review unconstitutional legislation, which can be said to basically respond to the challenge of how the judiciary should appropriately exercise its authority to protect the constitution while maintaining a balance of power with other political branches under the principle of separation of powers.
[Effect of unconstitutional ruling]
If the court were to declare a law unconstitutional regardless of political trends or social conditions, it would lack persuasive power and would not be considered a proper exercise of authority. This can also be seen in relation to the effect of unconstitutional rulings.

*Some explanations of terms that refer to "unconstitutional rulings" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…このように，裁判所は，違憲立法審査権の行使のため種々の原則や法理論を形成しており，それらは基本的には権力分立の原理のもとで司法部が他の政治部門と権力の均衡を保ちつつ，憲法保障のためにその権限をいかに適切に行使すべきかという課題にこたえているものだといえよう。
［違憲判決の効力］
　裁判所が政治の動向や社会の状況とは無関係に法令を違憲と宣言するならば，それは説得力に欠け正しい権限行使とはいえない。そのことを違憲判決の効力との関係でもみることができる。…

※「違憲判決」について言及している用語解説の一部を掲載しています。

出典｜株式会社平凡社世界大百科事典 第２版について | 情報