Grammar detail: CJK compatibility ideographs

CJK compatibility ideographs
My current mastery of this grammar:
LOG IN to view grammar mastery data
When the ability to display kanji on computer screens was first developed, different countries developed different approaches in parallel, and several ways of 'encoding' kanji, as well as several different 'character sets' were created. Today, these sets have largely been unified and subsumed into Unicode, a standardized set of all characters in all languages.
In some cases, the same character was represented in multiple character sets in different ways, even though the different versions might look identical. This can cause problems - for example, pasting one version into a dictionary may not return the expected results, because the dictionary's version of a word uses another version of the character.
To address this issue, a special set of Unicode characters known as 'CJK Compatibility Ideographs' was developed. Characters in this set act as 'pointers' to the preferred version of a character with multiple conflicting versions.
In some cases, though, the preferred version of the character is visually a little different. This can also cause confusing results, because applications that perform 'Unicode normalization' will automatically replace the 'compatibility' version with the 'preferred' version. This can mean that the character you enter in a search appears to change to another character.
For example, consider the character . This character was originally included in the Shift JIS encoding of Japanese, the most commonly used until Unicode. It is actually an earlier variant of the modern Joyo kanji : in the original Shift JIS variant, the left side, which is a form of , actually looks closer to it than the left side of the Joyo version, where one stroke is missing. However, if you paste into any text box in Safari, you will notice that what actually appears is !
Another commonly encountered example is , which is an older form of - an extra dot is present to the top right of the . is a common component, used in 19 Joyo kanji - and in almost all of them, the modern version (without the dot) is used. But not all! In and you can see the dot is still present.
LOG IN to view flashcard data

Kanji used in this grammar

ロウ   ほがらか cheerful; melodious   
Please LOG IN to view this kanji's mnemonic
リョウ   よ good   
シャ   もの person, someone   
Please LOG IN to view this kanji's mnemonic
ニチ   ジツ   sun; day   ひ    -か    
はし chopsticks   
Please LOG IN to view this kanji's mnemonic
ト   かける to gamble, wager, bet   
Please LOG IN to view this kanji's mnemonic
Problem with this grammar? Question or comment? Please CONTACT US.
Change component list
By default the component builder shows the most common components (themselves joyo kanji, or used in at least 3 other joyo kanji). Select an alternative set of components below.

Full details of all components and their English names can be found here.
Help with the component builder
For detailed instructions, see the Component builder how to guide.
To find any kanji, first try to identify the components it is made up of.
For any components you recognize, if you know the English meaning or name, start typing it in the text area. Full details of all components and their English names can be found here.
Alternatively, count the strokes of the component, and scan the list to find it visually.
To find the kanji :
  • Notice that it is made of several components: 氵 艹 口 夫.
  • 氵 艹 口 all have three strokes, so you could look in the list in the 3 stroke section. 夫 has four strokes.
  • Alternatively, you could start typing 'water' (氵), 'grass' (艹), 'mouth' (口) or 'husband' (夫) in the search area, and the components will be highlighted in yellow.
  • Keep adding components until you can see your kanji in the list of matches that appears near the top.