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I have come across this issue a number of times. I am studying Japanese at
High School, so I only know about 200 kanji. When I write words that consist
of more than two kanji characters, I am unsure whether it is acceptable to
write a word with the kanji I know, but also with hiragana to replace the
kanji that I don't know.

Here are some examples:

  1. 以来 - I know the second kanji, but not the first. Is it alright to write it as い来?
  2. 図書館 - I only know the second kanji. Is it alright to write it as と書かん?
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2018-01-20T23:48:55.350
56079
2019-01-31T03:31:18.280
2018-11-14T13:53:53.297
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question
kanji orthography kana
Is it acceptable to use kanji and hiragana in the same word if a kanji character is unknown?
When one of the characters in a set of characters is rare, contains many
strokes, or is hard to read for a large segment of the population, Japanese
will sometimes write it in kana. Both 以来 and 図書館 do not follow this example,
though. They are commonly viewed as a well-known set and viewed not so much as
separate characters placed together to create a meaning as they are seen as a
whole.

The basic rule is that there is no special reading for the character
combination (漢語). For example, 田舎 is only read as いなか, if you were to change
it to 田なか it would be very strange and people would assume you meant 田中.

Words that might be acceptable (though not common) as simplified would be:
豌豆→えん豆 続柄→つづき柄. For example, in supermarkets/convenience stores, they might
substitute a more difficult kanji with ひらがな if most people have a hard time
reading it.

Actually, [土嚢]{どのう} is a better example of words that commonly substitute one
kanji for kana. The Japanese word for ‘sandbag’ is often written as
[土のう](https://www.irisplaza.co.jp/IMAGE/HK/PRODUCT/H502891.jpg?iup=171106), as
the use of 嚢 is so infrequent. Also, 子供 can be written as 子ども.

Another example of discretionary product naming: 牛肩ロース is changed to
[牛かたロース](http://macrobiotic-daisuki.jp/cms/wp-
content/uploads/002-1-450x275.png).

*Do not take this as an endorsement to avoid learning and using any and all 漢字 that you can.
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2018-01-21T01:31:51.823
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2019-01-31T03:31:18.280
2019-01-31T03:31:18.280
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answer
There's a few different things going on in your question:

  1. A general question about whether you can write words in mixed kanji kana orthography
  2. An implicit question about when you can / cannot do so. 
  3. Two specific examples

Starting with the first question, all Japanese language users including native
speakers write some words using a mixture of kana and kanji. This happens for
at least three reasons. First, when taking notes or writing quickly, there's
not always time to write a 20 stroke character. So for something like 機会, you
will often see people write キ会. The same thing happens when you _hear_ but
don't see a person's name, you have to write it in kana (especially for ones
with more than one common way to write it).

Second, the list of kanji taught in schools is managed by a government (or
semi-governmental) entity and there are some things that are not on this list.
And that means there are some parts of words that are not normally written in
kanji -- like 処方せん (処方箋 if it were all kanji).

Third, there are some things like とる, みる where there are many different kanji
and it's hard to know which one fits best with a particular activity. Non-
native speakers like me are _worse_ at this than native speakers, but native
speakers also wind up just writing these in kana when unsure (this is separate
from the use of みる as helping verb that means to try in which case it should
always be written in kana).

So, the answer to your general question is **yes** and I've given three cases
where everyone does it.

A fourth case is books for children. These will only include characters the
child is expected to know and start adding more and more kanji as the grade
level goes up.

Moving to your two specific examples, I've seen 図書館 written as としょかん in pre-
schools and elementary schools. For two reasons, I think writing it と書かん might
be slightly confusing. First, 図 and 書 are both learned in the second grade, so
it's weird to have one but not the other. Second, と also functions as a
particle so if someone cannot tell where the word break is (remembering there
are no spaces in Japanese), then it's going to be harder to read than pure
kana or pure kanji.

I think 以来 would be hard to understand if written as い来. Here because くる is
such a common verb and い is the ending for Japanese adjectives, there's going
to be a lot of potential for this to make it more confusing.

Maybe others disagree with me on this.

One final thought is that I think it's "acceptable" and probably beneficial in
_language-learning_ contexts to write this way -- meaning when you submit
something to your teacher, they can help you know whether you're making
progress if you do this, but it's (in my view) less "acceptable" in general
communication in Japanese for the reasons I suggest above.
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2018-01-21T02:09:01.053
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2018-01-21T02:09:01.053
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answer