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It seems to me that sometimes the "no" that should be between two nouns is
omitted. if so, can this be done in any case or are there special cases?

For example, a case where I think there should be a "no" particle is this

> Birusu-sei de shugyō kaishi da!

I translate this as "It's the training's start in Birusu's planet" (correct me
if I'm wrong), and if I would have to write this back for me I would add a
"no" to read

> Birusu-sei de shugyō no kaishi da!

A similar phrase it's seen to use the "no"

> Gokū wa shugyō no tabi he!?"

Why? Is it optional?
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2016-08-27T04:14:07.253
38748
2016-08-27T14:56:33.910
2016-08-27T08:17:00.893
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question
grammar particle-の
Can the particle "no" sometimes be omitted?
Some nouns tend to directly follow arbitrary nouns without any particle and
form longer noun phrases. 開始 (kaishi) is one of such nouns, while 旅 is not
(although there are several fixed `noun + 旅` compounds). See my previous
answer for other examples: [the omission of an implied "の" creates the
appearance of a
四字熟語{よじじゅくご}?](https://japanese.stackexchange.com/q/19365/5010)

"Birusu-sei de shugyō _no_ kaishi da!" is grammatically fine, but I feel this
_no_ should be omitted. That is partly because this is a subtitle (which
should generally be short) and partly because this is a vigorous colloquial
sentence where particles tend to be omitted.
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2016-08-27T14:41:51.943
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2016-08-27T14:41:51.943
2017-04-13T12:43:44.260
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answer
No, you basically can't omit it.

Birusu-sei doesn't stand for "Birusu's planet" but "planet Birusu", though it
happens to be Birusu's planet (Birusu-no hoshi) too in the story. (The globe
is ware-ware no hoshi while it can't be ware-ware-boshi.)

shugyō-kaishi is one compound word and in this case it's almost the same as
omission from shugyo-no kaishi but not necessarily interpreted so in every
context. For example, it doesn't really work when your mentor says it at the
beginning of training.
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2016-08-27T14:56:33.910
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answer