ただしHowever; provided that; except that
ただし introduces a condition, exception, limitation, or caution that changes how the preceding statement applies. It is especially common in rules, notices, instructions, and careful written explanations.
How it works
First state the main permission, rule, offer, or general claim. Then use ただし before information that restricts its scope. Depending on the relationship, natural English may use “however,” “provided that,” “except that,” or “but note that.”
A required condition
この講座には誰でも参加できます。ただし、前日までに申し込んでください。
Anyone may take this course, provided that they apply by the previous day.
AnalyzeThe second sentence states a requirement that must be met for the permission in the first sentence to apply.
An exception
図書館は毎日開いています。ただし、年末年始は休館です。
The library is open every day, except that it is closed over the New Year holidays.
AnalyzeThe second statement removes a specific period from the general claim.
An objective caution
この容器は電子レンジで使えます。ただし、加熱後は非常に熱くなるので、やけどに注意してください。
This container can be used in a microwave. However, it becomes extremely hot after heating, so take care not to burn yourself.
AnalyzeThis is a practical warning rather than a strict exception, but it materially affects how the first statement should be acted on.
Condition versus side note
ただし narrows or qualifies the previous statement. By contrast, ちなみに introduces related side information that leaves the previous rule unchanged.
入館は午後六時までです。ちなみに、この建物は百年前に建てられました。
Admission is available until 6 p.m. Incidentally, this building was constructed a hundred years ago.
AnalyzeThe building's age does not alter the admission deadline, so this is a side note rather than a condition.
Firm condition versus personal reservation
ただし readily states an objective or enforceable condition. もっとも more often adds the speaker's reservation or partial correction and is less suitable for laying down a firm rule.
この店の料理はおいしい。もっとも、私には少し味が濃い。
The food at this restaurant is good, though I find the flavor a little strong.
AnalyzeThe second sentence is a personal reservation, not an enforceable condition.
More examples
会議室は無料で利用できます。ただし、飲食はできません。
The meeting room may be used free of charge. However, eating and drinking are not permitted.
Analyze申請は五月三十一日まで受け付けます。ただし、郵送の場合は当日消印有効です。
Applications will be accepted through May 31. For applications sent by mail, however, a postmark dated that day will be accepted.
Analyzeこの製品は水洗いできます。ただし、洗浄後は十分に乾かしてください。
This product can be washed with water. However, dry it thoroughly afterward.
Analyzeこのデータは自由に利用できます。ただし、出典を明記することが条件です。
This data may be used freely, provided that the source is clearly stated.
Analyze契約は自動的に更新されます。ただし、更新を希望しない場合は一か月前までにご連絡ください。
The contract will renew automatically. However, if you do not wish to renew it, please contact us at least one month in advance.
Analyze原則として全員参加です。ただし、医師の許可がない場合は参加できません。
In principle, everyone is required to participate. However, anyone without a doctor's approval may not take part.
Analyze