Official descriptions of kanji forms


How are the essential graphical identities of kanji defined? The length of the
first stroke in 土, for example, is essential, because if it's longer than the
third stroke, you have 士 instead. If you get that wrong, you get the kanji
wrong. But the angle of the first dot stroke in 火, for example, is not
essential. The [KanjiVG diagram for
it](http://kanjivg.tagaini.net/viewer.html?kanji=%E7%81%AB) shows it
descending to the right, but in the font that displays for me on this page, it
descends to the left. Similarly, [the first stroke of 言 can apparently be
either a dot or a
horizontal](http://kanjivg.tagaini.net/viewer.html?kanji=%E8%A8%80). None of
the resources I've looked at have explained either of these things or
explained what they mean for me if I want to write Japanese by hand. (UPDATE:
answers linked in the comments relating to 教科書体 have explained the variations
in the appearances of forms of 言 and 火. Thank you!)

### This is a really weird and obscure analogy, but it's the best one I can
come up with:

In traditional European heraldry, each coat of arms granted by the state must
be given a description in a formal language called _blazon_ that fully defines
the design. An illustrator who understand this language can read the
definition and translate it into an image that legally counts as that coat of
arms. Paraphrased into modern vernacular, [the Royal Arms of
England](https://upload.wikimedia.org/wikipedia/commons/thumb/9/97/Royal_Arms_of_England.svg/1280px-
Royal_Arms_of_England.svg.png) are defined as _a red field with three gold
lions walking [to the left] and looking aside, vertically arranged, with blue
tongues and claws_. Heraldic tradition predates the geometrically based art
techniques of the Renaissance, so exact proportions don't matter. As long as
your picture fits the description above, it _is_ the Royal Arms of England.
Art style and even art quality are irrelevant. Codified in the grammar and
semantics of blazon is an abstract set of rules that establish how all the
design elements fit together to define the unique identity of a person's coat
of arms, so that different designs can be identified even when haphazardly
scrawled by the errant hands of the sloppiest Medieval artists.

Do the Ministry of Education's canonical lists of kanji have similarly
essentialized descriptions of character forms? Are there other resources where
I can find similar information? I want to improve my penmanship, but I'm not
entirely clear on what constitutes good penmanship. RTK has been helpful in
learning the basic components that make up a kanji and their approximate
relative positions, but it tends to leave the deeper questions of "What makes
this kanji this kanji as opposed to that kanji?" and "Where is this stroke
supposed to go, how long is it supposed to be, and how strict are those
specifications?" unanswered. Stroke diagrams alone don't give you this
information because they just show one example of how a kanji can look. Where
I can _read explanations_ of what kanji are supposed to look like?

## Some examples of the general sort of thing I have in mind:

  * 一 is a ㇐.
  * 二 is a ㇐ over another, longer ㇐.
  * 三 is 二 with a shorter ㇐ interjected.
  * 十 is a ㇐ bisected by a longer ㇑ intersecting above the midpoint of the second.
  * 土 is 十 with a wider ㇐ appended.
  * 士 is 十 with a narrower ㇐ appended.
  * 口 is a ㇑ cooriginating with a ㇕ descending as far as the previous, followed by a ㇐ between the endpoints of the first and the second.
  * 言 (in its regular script form) is, from top to bottom, a ㇔, a ㇐, two shorter ㇐'s, and a 口 as wide as the previous.
  * 五 is a ㇐, a ㇑ descending leftward from left of the midpoint of the first; a ㇕ bisecting the second with its horizontal part, narrower than the first and descending to the end of the second; and a ㇐ longer than the first running over the endpoints of the two previous.
  * 吾 is 五 over a 口 as wide as the third stroke of the previous.
  * 語 is 言 beside 吾.
  * 日 is a narrow 口 with an interjected ㇐ between the midpoints of its first and second strokes.
  * 曰 is a 口 with an interjected ㇐ from the midpoint of its first stroke nearly to that of its second.
  * 白 is a 日 with a leftward 丶 prepended.
  * 百 is a 白 with a wider ㇐ prepended.
  * 昌 is 日 over another, wider 日.
  * 唱 is an elevated 口 beside 昌.
  * 寸 is a ㇐ intersecting a ㇚ on the upper right, with a ㇔ between the two on the lower left.
  * 専 is a wider ㇐ over 日 all bisected by a ㇑ from above the first to the midpoint of the last stroke of the second, with a 寸 appended.
  * 博 is a 十 with an elevated second stroke beside a 専 with a 丶 interjected up and to the right of the first stroke of the second.

The formal conventions of and some of the terminology in the above examples
are invented for the nonce, and of course, it's all in English. Any similar
natural-language descriptions in Japanese would be very different. I also
don't imagine that any existing document would be precisely as specific as I
have been in these examples; they could be more ambiguous or they could be
even more precise.

The Ministry of Education has lists of kanji for general use, for use in
names, etc. Do any of these lists or the documents associated with them
contain such formalized natural-language descriptions of the kanji those lists
are supposed to standardize, or are they all just _picture of kanji, picture
of kanji, picture of kanji_?

