A somewhat formal or literary term for a compassionate, humane heart. Often used in ethical or philosophical contexts.
仁心をもって人に接することが大切だ。
It is important to treat others with benevolence.
彼の政治理念の根底には仁心がある。
At the foundation of his political philosophy lies humanity.
Compound of 仁 (benevolence, humanity) and 心 (heart, mind). The exact historical derivation is uncertain, but the word follows a common Sino-Japanese pattern for abstract virtues.