Translation guide
Expresses that something is added to what was already mentioned. In Japanese, this is typically done with particles like に加えて, だけでなく, or 上に, depending on whether the addition is neutral, emphatic, or carries a positive/negative nuance.
To simply add one thing to another, without special emphasis.
A formal and neutral pattern meaning 'in addition to N'. Often used in written or formal spoken Japanese. N is a noun or noun phrase.
In addition to Japanese, I can also speak English.
In addition to my salary, I also received a bonus.
A common pattern meaning 'not only N, but also...'. Often followed by も. Slightly less formal than に加えて.
He can speak not only English but also Chinese.
This store has not only good prices but also good service.
Means 'besides N' or 'in addition to N'. Can be used in both formal and informal contexts.
In addition to him, who else is coming?
To emphasize that something is added, often with a sense of 'not only X but also Y'.
Means 'not to mention N' or 'N goes without saying'. Implies that N is obvious and something else is also true. Often followed by も.
He can speak Korean, not to mention Japanese.
Similar to はもちろん, but more formal and often used in written language.
This product is popular not only domestically but also overseas.
To add information that carries a positive or negative evaluation, often implying 'on top of that'.
Used to add a similar (both positive or both negative) fact. 'In addition to... also...'. Connects clauses or adjectives.
In addition to being smart, he also has a good personality.
In addition to being small, this apartment is far from the station.
To list several items, including the last one as an addition.
A basic listing pattern meaning 'N, N, and so on'. Implies there are other items. Not a direct translation but often used where 'in addition to' would appear in English lists.
There are books, pens, and other things on the desk.
に加えて is formal and neutral, often used in writing. だけでなく is more common in speech and emphasizes 'not only'. 上に adds a nuance of accumulation, often with positive or negative evaluation.
In addition to Japanese, I speak English. (neutral)
I speak not only Japanese but also English. (emphatic)
In addition to being good at Japanese, he's also fluent in English. (positive accumulation)
Do not try to translate 'in addition to' word-for-word as に加えて in every case. Sometimes a simple も or と is enough, or a different structure like だけでなく is more natural.