地獄の釜の蓋も開く（じごくのかまのふたもあく）

Japanese vocabulary

Meaning: even the demons of hell rest during Obon and the New Year

See it used in real works

• Example sentences from Japanese novels & web fiction (Massif)
• Hear “地獄の釜の蓋も開く” pronounced in real videos (YouGlish)