see no evil, hear no evil, speak no evil principle
Refers to the attitude or policy of deliberately ignoring or staying silent about problems, derived from the three wise monkeys. Often used critically in business or social contexts.
With that company's see-no-evil-hear-no-evil-speak-no-evil policy, problems get swept under the rug.
三猿 refers to the three wise monkeys themselves (see no evil, hear no evil, speak no evil), while 三猿主義 is the principle or policy based on that idea.
Compound of 三猿 (three monkeys) and 主義 (principle, -ism), referring to the famous 'see no evil, hear no evil, speak no evil' monkeys.