In 2011, Japan experienced one of the worst earthquakes in recorded history, which caused severe damage to several nuclear reactors. In the days following the earthquake, radioactive material was released into the atmosphere. Depending upon the wind's direction, neighboring countries could have been affected. Japan alerted neighboring countries of the radioactive releases, complying with:

customary international laws

Explanation:

Customary international laws are guidelines that determine that a country must manage a given situation based on international law, allowing countries that may be affected by that situation to be informed in time to establish their own guidelines for coping with the situation.

When Japan announced to neighboring countries about possible air contamination, it means that Japan has acted within customary international laws, allowing countries that could be affected by this air, to establish their own coping strategies.

european feudalism was a combination of legal and military customs in medieval europe that flourished between the 9th and 15th centuries. broadly defined, it was a way of structuring society around relationships derived from the holding of land in exchange for service or labour.

japanese feudalism. the era of feudalism in japan took place from the 12th through 19th centuries. during that period local rulers, either powerful families or military warlords, dominated the land, while the emperor was merely a figurehead and not a significant political presence.

the above statement/question is (true);