Translation guide
The English word 'additional' is used to describe something extra, supplementary, or added on top of what already exists. In Japanese, the most common and natural way to express this concept depends on whether you are talking about an additional item, an additional action, or an additional amount. The most versatile and recommended option is the prefix 追加の (tsuika no), which directly means 'additional' and can be used with many nouns. For verbs, the adverb さらに (sara ni) is often used to mean 'furthermore' or 'in addition'. Other options include 付加的な (fukateki na) for formal or technical contexts, and 別の (betsu no) when 'additional' implies 'another' or 'separate'. Be careful not to directly translate 'additional' as 追加的な (tsuikateki na), which is less common and can sound unnatural.
additional (item/thing)
Most common and versatile. Use before a noun.
additionally, in addition (for actions)
Adverb used with verbs to mean 'furthermore' or 'in addition'.
Describing an extra or supplementary object, person, or concept that is added to an existing set.
additional information · additional cost · additional resources
This is the most direct and commonly used translation for 'additional' when modifying a noun. It comes from the noun 追加 (tsuika, 'addition') and the possessive particle の. It can be used in both casual and formal settings.
We need additional information.
There is no additional charge.
When 'additional' means 'another' or 'a different one', 別の (betsu no) is more natural. It implies a separate instance rather than an add-on.
Please come on an additional (another) day.
This is a more formal or technical term, often used in written language or specialized contexts like economics or computing. It emphasizes something added as an extra feature or supplement.
Expressing that an action is done further, more, or in addition to what has already been done.
additionally, we need to... · additional training is required · additional efforts were made
This adverb means 'furthermore', 'in addition', or 'more'. It is used with verbs to indicate an additional action or an increase in degree. It is very common and natural in both spoken and written Japanese.
Please explain in additional detail.
In casual conversation, もっと (motto) can be used to mean 'more' or 'additional' when requesting or describing an increase. It is less formal than さらに.
This phrase uses the noun 追加 (addition) with the particle で to mean 'additionally' or 'as an extra'. It is often used when ordering or requesting something extra.
Referring to an extra quantity, often in contexts like money, time, or countable items.
additional funds · additional time · additional copies
Again, 追加の is the go-to for 'additional' with nouns, including amounts. It works for both countable and uncountable nouns.
Do you need additional time?
We raised additional funds.
This word means 'extra' or 'spare', often implying more than necessary. It can be used for additional amounts that are surplus or backup.
When used with numbers or counters, もう (mō) means 'another' or 'additional'. It is common in casual speech.
While 追加的 (tsuikateki) is a valid word meaning 'additional', it is rarely used in natural Japanese. The phrase 追加の (tsuika no) is far more common and should be your default choice. Using 追加的な can sound stiff or unnatural.
Are there any additional questions?
Both mean 'more' or 'additional', but さらに is more formal and often used in written or polite speech, while もっと is casual and common in everyday conversation. さらに can also mean 'furthermore' in a logical sense, whereas もっと simply indicates a greater quantity or degree.
Additional effort is needed.
We need additional staff for the event.
There will be an additional charge for late payment.
Please provide any additional comments.
An additional (another) problem occurred.
We provide additional services.
Additional people participated.
もっと水をください。
Can I have additional water?
Can I place an additional order?
Do you have additional (extra) money?
One additional cup, please.
One additional person is coming.
Try harder! (Do additional effort!)