家筋|いえすじiesuji[0]heiban (flat)

1. nounlineage; pedigree; family line

• Synonym素性すじょうNeutralA neutral word for a person's origins and background, also covering where a thing came from, as in 「素性を隠す」; 「家筋」 speaks only of family bloodline.
• Synonym家系かけいNeutralA neutral word for the family line traced through the generations, as in 「医者の家系」; more common in everyday use than 「家筋」.
• Synonym血統けっとうWrittenA written term stressing the blood inherited from one's ancestors; also used of animals, as in 「血統書」.
• Synonym家柄いえがらNeutralA neutral word centered on a family's social standing and prestige, as in 「家柄がいい」; 「家筋」 leans toward inherited bloodline.
• Synonym血筋ちすじNeutralA neutral word stressing blood ties, common in both speech and writing, as in 「血筋は争えない」「皇室の血筋」.
• Synonym毛並みけなみCasualOriginally an animal's coat; figuratively one's breeding or background, as in 「毛並みがいい」. Strongly colloquial.
• Synonym系譜けいふWrittenA written term for a genealogical record of blood ties; also used for the transmission of ideas or schools of thought.
• Synonym出自しゅつじWrittenA written term for where one comes from or one's origins, as in 「出自を問わず」; not necessarily family bloodline.
• Synonym氏素性うじすじょうWrittenA written term for a person's family background, mostly seen in 「氏素性の知れない」.
• Synonym門地もんちWrittenA rare written term for a family's rank or standing, mostly in legal texts; in daily speech say 「家柄」.
• Synonym門閥もんばつWrittenA rare written term for powerful, prestigious families and the influence they wield, as in 「門閥政治」.
• Synonym家門かもんWrittenA written term for the whole family or clan rather than the bloodline itself, as in 「家門の名誉」.

「家筋」 is for a family bloodline passed down the generations, as in 「名家の家筋」. Everyday speech favors 「家系」 and 「血筋」; 「家柄」 covers a family's social standing, 「素性」 a person's origins. Written terms: 「血統」 (blood descent, also animals), 「系譜」 (genealogies), 「出自」 (origins), 「氏素性」 (background), 「家門」 (the clan); 「門地」「門閥」 are rare and 「毛並み」 colloquial.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 一ひとつの家系かけいが代々だいだい続つづいてきた血筋ちすじや血統けっとうのこと。