private interests; personal interests
Refers to one's own benefit or profit, often contrasted with 公益 (public interest).
See also: 公益
政治家は公益より私益を優先すべきではない。
Politicians should not prioritize private interests over public interest.
彼の行動は私益のためだけだった。
His actions were solely for personal gain.
私益 means private or personal interest, standing in contrast to 国益, which is the collective interest of the whole nation.
公益 is the benefit or welfare of the general public, while 私益 is a private or individual benefit that may conflict with it.
Compound of 私 (private) and 益 (benefit).