(ふたん) A responsibility, usually financial, which is declared by a system. “If a guest falls off the hotel roof, it’s the hotel’s responsibility.” “The parent is responsible for paying for the child’s lunch at boarding school.”
(せおう) An emotional burden, which is NOT part of a pre-arranged system:Taking care of your retarded sister, dealing with your son’s alcoholism, the feeling that you let down everyone on your team.