自家|じかjika[1]atamadaka (head-high)

1. nounone's own house
2. prenominal modifierown; personal; autologous

• Synonym自らみずからNeutralRefers to the person themselves and to doing things in person; often adverbial, as in 「自ら行う」. 「自家」 works mostly as a prefix meaning one's own or homemade.
• Synonym自己じこNeutralRefers to the self itself; often seen in 「自己紹介」 and 「自己責任」. 「自家」 stresses what is one’s own or self-produced, as in 「自家製」.
• Antonym他家たけWrittenAnother family's house, the direct opposite of 「自家」. A written-style word, little used even in prose; in everyday speech, say 「よその家」.

For things one makes or produces oneself, whether at home or in-house at a shop or business, use 「自家製」; for one’s own use, 「自家用」. For the self itself, use 「自己」; for doing something in person, use 「自ら」.

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

1. 自分じぶんの家いえ。
2. 自分自身じぶんじしんのこと。