belongings of the deceased; inherited item; memento
Refers to items left behind by someone who has died, often with emotional or legal significance. Can range from personal keepsakes to the entire estate.
While sorting through my grandmother's belongings, I found an old letter.
He treasures that watch as a memento of his father.
lost item; lost property
A less common, somewhat formal or legal term for a lost item. In everyday speech, 忘れ物 or 落とし物 are more typical; 遺失物 is a near-synonym often used in official contexts.
See also: 遺失物
I found my lost umbrella at the station's lost-and-found office.
While going through my grandmother's belongings, I found an old diary.
I handed in the lost item I had found to the police box.
遺失物 is the standard legal term for lost property, while 遺品 used in this sense is rarer and sounds more literary or old-fashioned.
遺産 usually refers to the estate or inheritance (money, property, legacy) left by the deceased, whereas 遺品 focuses on tangible personal belongings.
忘れ物 is the everyday word for something accidentally left behind, while 遺品 in the lost-property sense is formal and uncommon in casual speech.
副葬品 are items placed in a grave with the deceased, whereas 遺品 are personal belongings left behind by someone who died, kept by the living rather than buried.
遺品 means any belongings or personal effects left behind by someone who has died, whereas 遺作 refers specifically to a creative work they left unfinished or unpublished at death.
Compound of 遺 (い, 'leave behind') and 品 (ひん, 'article, item'). The 'lost item' sense is an extension of the idea of something left behind, though now less common.
My father's belongings are still kept in the closet at my parents' house.