Basically I’m wondering if です can be nominalized.

For example how would you say:

”I don’t like being mean.” or

”It’s good to be nice!”

Can I say:



These are my attempts but I don’t feel confident in these!


i-adjective + である is not grammatical for the same reason i-adjective + だ is not grammatical: i-adjectives already serve as a predicate without need for a copula (or in other words, you can imagine that the meaning “is”/“to be” is embedded in the i-adjective). i-adjective + です is grammatical, but the です here is not the usual copula, it is just a polite marker which serves no purpose but to make the i-adjective polite — you can tell the difference because it never conjugated (i.e., 優しいでした and such is incorrect).

Unfortunately this reality makes the phrasing of your question very hard to respond to because it’s unclear if you’re asking “how to nominalize です (politeness)” or “how to nominalize i-adjectives”.

The former is easy to answer: you don’t, because you generally don’t have politeness in relative clauses.

The latter is more complicated.

Since an i-adjective is a predicate, you can stick it right next to the の:

“I like kind things”

But as you can see it doesn’t have the intended meaning.

To get the intended meaning you need to use 優しくする:

“I like being nice to people”

Aside for Advanced Learners

Unfortunately this is all a little oversimplified and “優しいのが好き” can, depending on what subject you consider is omitted or what context is available, also mean other things like

“I like the fact that he is kind”

“I like when someones interaction style is kind” (=“I like when people are kind to me”)

(And most confusingly, this last imagined context can also lead to it meaning “I like being nice to people”, but only with the right context, which is why it is not the default go-to phrase when you are trying to say this.)

But it’s hard to all explain at once. Hope this helps!

  • you’re right, i wasn’t evening thinking about how い adjectives conjugate on their own. i’m going to edit my question based on that but your answer really did hit what i was looking for! quick confirmation though: how would you say “it’s good to be X” then? like 優しくするのがいい? – jacoballens Jul 3 '19 at 13:33
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    That’s understandable, but it doesn’t feel like a common thing to say. 〜のがいい feels more like “I prefer when 〜” as opposed to a categorical statement like “It is good to be 〜”. Depending on the situation it could be 優しくしたほうがいい or 人に優しくすることは大切です or some other variation... (of course this is venturing more into how to translate a specific phrase well, which is always tough) – Darius Jahandarie Jul 3 '19 at 13:56
  • @jacoballens I believe his question was not about nominalisation. His question was about pattern [I (don't like) like that I am X]. For example, he does not know how to say: [I like that I am red.] [I don't like that I am yellow.] His question is not about [being] in general. His question is about saying like/dislike about that fact that I or somebody is something. – Tchibi-kun Jul 3 '19 at 18:46
  • I suggest you to rethink your question title as how to nominalise adjective clauses, if this is your actual doubt. – jarmanso7 Oct 12 '19 at 10:46

Yes, です can be nominalised in the form である by attaching こと. However, as pointed out by previous answers and comments here, this is not the case with the です you present in your example sentences which is marking the sentence as polite.

You can say であること to nominalise a clause in certain grammar patterns such as Aことが分かる, where A is a noun or a na-adjective sentence you would normally end with です:

東京は安全です。 Tokyo is safe.

このレポートを読むと、東京は安全であることが分かります。You can realise Tokio is safe by reading that report.

For sure there may be other patterns where this nominalisation であること takes place.


Basically I’m wondering if です can be nominalized.


です is not the dictionary form.
Dictionary form for です is だ.
So, your question should be asked as:
Can だ be nominalised?


Nominalisation (or to nominalise) litteraly means [to make a noun].
So, if to say your question in simple words, than it would turn to:
Can I make a noun from だ?

If to look at how だ is used everywhere it is easy to notice, that だ is always used with some other word and never alone. Therefore, there is just no need to make a noun from だ, cause it always make sense to use the word, which was used with だ, than to use だ itself.

I don't have a right to give any advices on Japanese usage, but if I have to find solution for your case, I would split your sentances into 2 parts like this.

When I am a mean person, I don't like this.
When I am a mean person, I feel bad about it.
When I am a nice person, I like this.
When I am a nice person, I feel good about it.

Maybe this stratagy is stupid, but I believe it is better, than to search for word-to-word translation from other language to Japanese.

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    "Dictionary form for です is だ." That's actually false. The dictionary form of です is です, which is why you can find it in dictionaries by looking up です: weblio.jp/content/%E3%81%A7%E3%81%99 – snailplane Jul 3 '19 at 19:13
  • You are 100% right. I just wanted to point out, that when somebody asks about desu/masu, than people might think that the question is about how to build something polite. But in his case, the problem is much deeper and he does not understand the fundumental design (aka pattern) of how to build [I (don't) like that I am (not) X]. – Tchibi-kun Jul 3 '19 at 19:56

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