Positioning of small kana in compound kana


When writing compound kana the small kana is slightly lower than centre.

But is it slightly left of centre as well ?

Take じゃあ

Here we have 3 kana.

Firstly, when writing, is the total width of the space allocated to the small
kana the same as if it were a big kana ?

じゃあじゃあじゃあじゃあじゃあじゃあじゃあじゃあじゃあじゃあじゃあ

じやあじやあじやあじやあじやあじやあじやあじやあじやあじやあじやあ

The font I'm using here certainly gives them equal width.

Secondly, and mainly, when writing, is the small kana slightly left of centre
and hence spatially closer to じ than あ ? The typing font seems to place it
central. But I read somewhere that it should be slightly left of centre of the
square allocated to it.




In handwriting, we are taught in the writing class to put small kana at such
position in each square as on the image below (from [How to Use Japanese
Manuscript
Paper](https://hiroba.jitco.or.jp/info/news_en/news_htu_2017-02-01_en/)):

[![kana-punct-
position](https://i.stack.imgur.com/d9QwY.png)](https://i.stack.imgur.com/d9QwY.png)

And this is the commonest way how we conceive they should be written. In free
handwriting, however, characters are rarely written in equal width, that means
a small kana only occupies as much width/height as it takes up, so this would
not be a real problem. ([A random example](https://edi-labo.com/blog/?p=2694)
below)

[![handwriting](https://i.stack.imgur.com/XkTGZ.png)](https://i.stack.imgur.com/XkTGZ.png)

On the other hand, small kana in typefaces are normally centralized per the
direction of text flow. According to [_Requirements for Japanese Text
Layout_](https://www.w3.org/TR/jlreq/#kanji_hiragana_and_katakana):

> In vertical writing mode, the letter face of small kana (cl-11) characters
> (ぁぃぅァィゥ etc.) is placed at the vertical center and to the right of the
> horizontal center of the character frame; in horizontal writing mode, it is
> placed at the horizontal center and below the vertical center (see Fig.
> 2.4). Also there are punctuation marks with letter faces that are not placed
> at the vertical and horizontal center of the character frame.

[![Small kana and the position of their letter face in the character
frame.](https://i.stack.imgur.com/7JRKk.png)](https://i.stack.imgur.com/7JRKk.png)

Aligning beside previous character was only conventional in the metal type
age, because small kana was realized by using half-sized pieces of type at
that time, and it was easier for typesetters to either align by one side or
leave no spaces. ([Another random
example](https://dl.ndl.go.jp/info:ndljp/pid/1032668/13) below)

[![pre-wwii
printing](https://i.stack.imgur.com/S69DH.png)](https://i.stack.imgur.com/S69DH.png)




In handwriting, we are taught in the writing class to put small kana at such
position in each square as on the image below (from [How to Use Japanese
Manuscript
Paper](https://hiroba.jitco.or.jp/info/news_en/news_htu_2017-02-01_en/)):

[![kana-punct-
position](https://i.stack.imgur.com/d9QwY.png)](https://i.stack.imgur.com/d9QwY.png)

And this is the commonest way how we conceive they should be written. In free
handwriting, however, characters are rarely written in equal width, that means
a small kana only occupies as much width/height as it takes up, so this would
not be a real problem. ([A random example](https://edi-labo.com/blog/?p=2694)
below)

[![handwriting](https://i.stack.imgur.com/XkTGZ.png)](https://i.stack.imgur.com/XkTGZ.png)

On the other hand, small kana in typefaces are normally centralized per the
direction of text flow. According to [_Requirements for Japanese Text
Layout_](https://www.w3.org/TR/jlreq/#kanji_hiragana_and_katakana):

> In vertical writing mode, the letter face of small kana (cl-11) characters
> (ぁぃぅァィゥ etc.) is placed at the vertical center and to the right of the
> horizontal center of the character frame; in horizontal writing mode, it is
> placed at the horizontal center and below the vertical center (see Fig.
> 2.4). Also there are punctuation marks with letter faces that are not placed
> at the vertical and horizontal center of the character frame.

[![Small kana and the position of their letter face in the character
frame.](https://i.stack.imgur.com/7JRKk.png)](https://i.stack.imgur.com/7JRKk.png)

Aligning beside previous character was only conventional in the metal type
age, because small kana was realized by using half-sized pieces of type at
that time, and it was easier for typesetters to either align by one side or
leave no spaces. ([Another random
example](https://dl.ndl.go.jp/info:ndljp/pid/1032668/13) below)

[![pre-wwii
printing](https://i.stack.imgur.com/S69DH.png)](https://i.stack.imgur.com/S69DH.png)

