Japan, among many other countries, subscribes to the idea that the milder law prevails. If an action was illegal but it was made legal after the fact, then it was legal. Similarly, an unconstitutional action can be made constitutional after the fact.
Constitutions are not supposed to be absolute constraints. They are not supposed to prevent a country from doing what is reasonable or necessary, as long as people are willing to accept that it was reasonable and necessary.
Military breaks constitution all the times, including in US. I believe most constitutions have anti torture stance, but most military have torture camp.
In a complete disregard for the rule of law? Which other democratic countries with anti-nuclear constitution had a secret nuclear program?
Japan, among many other countries, subscribes to the idea that the milder law prevails. If an action was illegal but it was made legal after the fact, then it was legal. Similarly, an unconstitutional action can be made constitutional after the fact.
Constitutions are not supposed to be absolute constraints. They are not supposed to prevent a country from doing what is reasonable or necessary, as long as people are willing to accept that it was reasonable and necessary.
Military breaks constitution all the times, including in US. I believe most constitutions have anti torture stance, but most military have torture camp.
Israel, though I don't think they have it in their constitution (they don't have a constitution).