Japanese children were rated as second-worst in mental well-being among 38 developed and emerging countries due to poor life satisfaction and suicides, a UNICEF report said Thursday.

While Japanese children ranked first in physical health and live in relatively well-off economic circumstances, bullying in schools as well as difficult family relationships are leading to a lack of psychological well-being, the U.N. Children's Fund found.

Only children in New Zealand ranked worse than Japan in terms of mental well-being.