Father-in-law - Shouto

Japanese: 舅 - シュウト

1. (Father-in-law) The father of one's husband or wife.
2 (mother-in-law) Same as "mother-in-law."
[Additional information] "Father-in-law" and "mother-in-law" are not used to address one's spouse's parents. Also, when talking about one's spouse's parents to others, "o" is not added. When talking about the "father-in-law" and "mother-in-law" of the other person or the person being talked about, "o" is added and they are called "father-in-law" and "mother-in-law".
[Synonyms] ( 1 ) Father, father-in-law, adoptive father, stepfather, stepfather

Kyuu [Father-in-law] [Kanji item]

[Sound] Kyu (Kiu) (Chinese) [Reading] Father-in-law
1. Uncle. Mother's brother. "Father-in-law"
2 Father-in-law. Mother-in-law and father-in-law Kyuko /Father-in-law"

Brother and sister [ ^× father-in-law]

⇒ father-in-law

Source: About Shogakukan Digital Daijisen Information | Legend

Japanese:

１（舅）夫または妻の父。しゅうとおや。
２（姑）「しゅうとめ（姑）」に同じ。
[補説]「舅」「姑」は、配偶者の父母に対する呼びかけには使わない。また、配偶者の父母のことを他人に話すときには「お」を付けない。相手、または話題になっている人の「舅」「姑」については「お」を付けて「お舅」「お姑」と言う。
[類語]（1）父・義父・養父・まま父・継父・岳父