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This might sound like a strange question, but how does the usage of commas
differ when used in Japanese compared to English?

I believe `りんご、オレンジとバナナ` wouldn't work, but that it's OK to list like
`りんご、オレンジ、バナナ` or `りんご、オレンジ、またはバナナ`. When should `りんごとオレンジとバナナ` and similar be
used instead of commas or vice-versa?

I've heard that going e.g. `分かりにくくて、読みたくない` with i-adjectives isn't correct
but `分かりにくいし、読みたくない` and `分かりにくく、読みたくない` is. I'm guessing it's OK to go
`簡単で、特に問題はない` and `簡単し、特に問題はない` right?

Additionally, what is the meaning of `、。` at the end of a sentence, e.g.
`気にしてなかったけど、。`? I think it might have some kind of emotive effect, so I think
I'd translate it as "I didn't _really_ care though" (for emphasis.) I might
translate `、。` as "I'm flustered that..." in some other contexts but I'm not
sure.
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2011-11-23T05:31:15.920
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grammar punctuation
Usage of commas in Japanese sentences
The symbol “、” is called [読点]{とうてん}. It is used to denote a semantic
separation or a pause. Compared to comma in English, the usage of 読点 in
Japanese is less governed by the grammatical rules. In other words, in
Japanese, the author is free to use or not to use 読点 in any place where a
separation makes sense.

When two nouns are placed side by side without any particle, a 読点 is almost
necessary.

> I believe `りんご、オレンジとバナナ` wouldn't work, but that it's OK to list like
> `りんご、オレンジ、バナナ` or `りんご、オレンジ、またはバナナ`. When should `りんごとオレンジとバナナ` and similar
> be used instead of commas or vice-versa?

You are required to put a 読点 between two nouns placed side by side. You are
free to put 読点 after particle と or before adverb または.

> I've heard that going e.g. `分かりにくくて、読みたくない` with i-adjectives isn't correct
> but `分かりにくいし、読みたくない` and `分かりにくく、読みたくない` is. I'm guessing it's OK to go
> `簡単で、特に問題はない` and `簡単し、特に問題はない` right?

There is no verb 簡単する, and therefore 簡単し is ungrammatical. Maybe you meant
“簡単だし、特に問題はない.”

All of “分かりにくくて、読みたくない,” “分かりにくいし、読みたくない,” “分かりにくく、読みたくない,” “簡単で、特に問題はない,” and
“簡単だし、特に問題はない” are grammatical. In these examples, you can also omit the 読点.
However, depending on the rest of the sentence, omitting the 読点 in
“簡単で、特に問題はない” or “簡単だし、特に問題はない” may make the sentence harder to read because
it connects two descriptions (簡単だ and 特に問題はない) of different length.

> Additionally, what is the meaning of `、。` at the end of a sentence, e.g.
> `気にしてなかったけど、。`?

The combination “、。” is incorrect in the standard orthography in Japanese.
Some people make a nonstandard use of three 読点 (、、、) in place of 三点リーダー (…),
which is used in the same way as the ellipsis in English. I would interpret
“、。” as “…。” if anyone uses the former.
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2011-11-23T13:27:55.157
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answer
Another way of describing a list is using 中点 "・".
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2011-11-24T22:28:49.460
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To expand on the topic a bit, constructions like 「りんごやオレンジ、バナナ（など）」 are very
common in NHK News Easy, with や being any of a variety of listing particles. I
haven't run across this in any grammar lessons, but NHK should be a reliable
source.

Here is a [reference
article](http://www3.nhk.or.jp/news/easy/k10010060681000/k10010060681000.html)
with this grammar in the first sentence, which I also transcribed below for
convenience:

> 日本の公立の小学校や中学校、高校などに通っていて、外国の国籍を持っている子どもは約7万3000人います。

The key section there is 「小学校や中学校、高校」.
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Here's another example where a comma is desperately needed but was omitted

> 窓を閉めて電気をつけてください  
>  (Literally: Window Close Light Turn on Please)

This sentence is from a textbook! I suppose when speaking, a person can say
'to' (and) or add an unvoiced pause or add another transition word, but this
is just awkward.

It wasn't until 1946 until the period (maru) was introduced because Emperor
Meiji read foreign works and thought it would be a good idea. We can only hope
the current and future prime ministers will encountered a comma and see its
value.
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