expression
a child is an everlasting responsibility
Proverb meaning that parents are bound by love and duty to their children for life, like a yoke around the neck that cannot be removed.
子は三界の首枷というが、親になるとその重みがよくわかる。
They say a child is an everlasting responsibility, and once you become a parent you really understand the weight of it.
A traditional Japanese proverb. 三界 (sangai) refers to the three realms of existence in Buddhist cosmology, implying that the bond between parent and child transcends all worlds. 首枷 (kubikase) is a yoke or pillory worn around the neck, symbolizing an inescapable burden.