お宅 can mean your home, you, or an enthusiast

お宅（おたく） most usefully means another person’s home or household, said with respect. お宅に伺う is “to visit your or their home,” and お宅では can mean “at your place” or “in your household.” The same word also has a second-person use meaning “you,” but that use carries social distance and is not a general replacement for あなた. The modern enthusiast sense is usually written オタク in katakana.

The spelling gives you an immediate clue. お宅 with the house character normally points to someone else’s home, household, organization, or, in a bounded use, the person on the other side of the conversation. オタク normally labels someone deeply interested in a particular field. Context still matters, but keeping the spellings separate prevents the most disruptive misunderstanding.

For the home sense, viewpoint matters. Use お宅 for the listener’s home or a respected third person’s home: 田中さんのお宅 is “Tanaka’s home.” For your own home, ordinary choices are 家（いえ）, conversational うち, or the more neutral 自宅（じたく）. Saying 私のお宅 raises your own home with a form meant for the other person’s side, so it is not the normal choice. In formal service language, ご自宅（ごじたく） respectfully names the customer’s or listener’s own residence.

The phrase お宅に伺う works as a matched polite pair. お宅 respects the destination, and 伺う presents the speaker’s visit humbly. お宅では shifts from the building to what happens at that home or within that household. It can introduce a routine or preference, but household questions can be personal. Use it when the relationship and topic already make the question appropriate.

The second-person pronoun お宅 is different. Dictionaries describe it as addressing someone of roughly equal status who is not especially close, with light respect. That distance can sound formal, detached, old-fashioned, or challenging depending on the speaker and scene. Learners should recognize お宅はどう思いますか, but a name plus さん, a role such as 店長, or an omitted subject is usually safer. あなた is not a universal repair either. Japanese often avoids a second-person pronoun when the listener is obvious.

For the enthusiast sense, オタク can combine with a field, as in 鉄道オタク or 文房具オタク. The word has a history of disparaging use, and people differ in whether they welcome it. A self-description can be friendly or playful, but do not decide that someone is an オタク from appearance, social behavior, or one hobby. If you do not know how the person identifies, say what they like or know well instead.

One box of books, three different readings of おたく

Mina helps organize a neighborhood book exchange. She needs to collect donated books from Sato, whom she knows through the committee. First she asks about the visit.

Here お宅 names Sato’s home, not Sato as a person. 伺ってもよろしいですか makes a careful request to visit. With a close friend, Mina could simply say あした、家に行ってもいい？, but the committee relationship supports the more respectful pair.

Mina also needs to know how the donated books are stored, so she asks a household-specific question.

The particle sequence では sets Sato’s home or household as the frame: “as for at your place.” This is natural because they are already discussing the collection. Without that shared purpose, asking about the inside of someone’s home could feel intrusive.

Sato then asks where Mina is doing the sorting. Mina answers from her own side.

Mina says うち, not お宅, because she means her own place. 家 would also work. 自宅 would sound more neutral and administrative, while うち suits this ordinary conversation.

The exchange has a delivery service for people who cannot bring books themselves. Mina explains the formal option.

ご自宅 fits a service announcement because it clearly and formally means the recipient’s residence. It avoids the person-pronoun reading that お宅 can acquire. In a less formal conversation, お宅に送ります can also refer respectfully to the listener’s home.

At the next planning meeting, Mina hears one representative ask another a question.

This time お宅 is the person, not the home. The two representatives are not close, and the wording keeps some distance. Mina needs to understand it, but she does not need to copy it. She can address the listener by name, or simply ask この案をどう思いますか when the listener is clear.

After the meeting, someone notices Mina comparing the paper and binding of every notebook on the supply table. Mina chooses her own label.

Katakana オタク signals the enthusiast sense. Mina is describing herself and immediately names what she enjoys, so the label does not ask the listener to accept a stereotype. The same pattern can name many interests; it is not limited to anime or manga.

The reliable first question is not “Which English word means otaku?” It is “What does this form point to?” A destination or household supports お宅. Your own place supports 家, うち, or 自宅. Formal customer-facing residence language often supports ご自宅. A person-pronoun お宅 needs a narrow relationship and register. A hobby label is usually オタク, with the person’s own preference deciding whether it fits.