Translation guide
A custom where a widower marries his deceased wife's sister. This is a culturally specific concept; Japanese has a direct term but it is not widely known. In most contexts, explaining the situation is more natural.
The specific custom of marrying a deceased wife's sister
Direct anthropological term for sororate marriage. Literally 'reverse relation marriage'. Used in academic contexts.
その部族では逆縁婚の習慣が残っている。
The custom of sororate marriage remains in that tribe.
Descriptive phrase meaning 'to marry the younger sister of one's deceased wife'. More natural in conversation than the technical term.
彼は亡き妻の妹と結婚した。
He married his deceased wife's younger sister.
Another descriptive phrase: 'after the wife's death, to marry her younger sister'. Clarifies the sequence.
妻の死後、その妹と結婚する慣習がある。
There is a custom of marrying the younger sister after the wife's death.
Sororate marriage is not a common concept in modern Japan. The term 逆縁婚 is primarily used in anthropology or historical contexts. In everyday conversation, it's better to explain the situation rather than use the technical term.