How many Joyo (and perhaps Jinmeiyo) Kanji have only one onyomi?


I feel this is really beneficial to have a list for in my studies. The reason
is if I see an unknown word that I'm reasonably sure has onyomi readings, if
the kanji in question have only one possible reading, I can automatically read
the word. Score! But if there are multiple onyomi per character, I'm going to
have to consider which reading applies. Single onyomi Kanji make for smooth
reading and learning.

As for the multiple-onyomi Kanji, I'll be wanting more careful practice, so
I'd like to know the list of them.

I could find all this out manually by looking up thousands of characters, but
is this a known thing?




  * The number of Joyo kanji with only one **Joyo** ON-YOMI is 1789 characters. 

On [this](https://www.kanjidatabase.com/index.php) useful kanji database
website, you can query Joyo kanji for various criteria. In the ' _Select Kanji
from Database_ ' section
([here](https://www.kanjidatabase.com/kanji_database.php)), I performed a
query where `# of On = 1`, together with what the ON-YOMI is and what the
translation is.

The results of that query can be seen here: [JOYO KANJI ONE JOYO ON-
YOMI](https://pastebin.com/6a9e5Jpd).

My answer does not address the issue of including Jinmeiyo kanji.

**_EDIT:** This is a list of Joyo kanji that have only one Joyo ON-YOMI
reading, but they may have non-Joyo ON-YOMI readings._




  * The number of Joyo kanji with only one **Joyo** ON-YOMI is 1789 characters. 

On [this](https://www.kanjidatabase.com/index.php) useful kanji database
website, you can query Joyo kanji for various criteria. In the ' _Select Kanji
from Database_ ' section
([here](https://www.kanjidatabase.com/kanji_database.php)), I performed a
query where `# of On = 1`, together with what the ON-YOMI is and what the
translation is.

The results of that query can be seen here: [JOYO KANJI ONE JOYO ON-
YOMI](https://pastebin.com/6a9e5Jpd).

My answer does not address the issue of including Jinmeiyo kanji.

**_EDIT:** This is a list of Joyo kanji that have only one Joyo ON-YOMI
reading, but they may have non-Joyo ON-YOMI readings._

