# Japanese practise paper (Genkou Youshi)

I'm trying to figure out a way of creating a Japanese character practice sheet. The type that I'm looking to create looks a little like the Genkou Youshi that this question was looking to cover. Except that a Japanese character is inserted into the topmost 4-5 boxes of a row, where the instances of the character after the first are printed in a progressively lighter shade until they have faded away completely.

Here's an example of what I'm looking to create:

Is this possible to do? If so, where should I start? I'm a bit of a beginner to TeX, but am willing to learn.

I'm currently using:

• TexMaker 3.5
• TexLive 2011
• Windows 7 (But I can move over the Debian if needed)
• This answer from the previously mentioned question.
• The Japanese character set contains a LOT of Chinese characters, too. May 20, 2013 at 11:13

Here you go. My code is a mild extension of this answer by Paul Gaborit.

## Code

\documentclass{article}
\usepackage{tikz}
\pagestyle{empty}
\newcommand\genkoyoshi[4]{%
\def\rowopacities{#1}%
\def\colnames{#2}%
\def\size{#3}%
\def\sep{#4}%
\begin{tikzpicture}[yscale=-1]
\pgfmathsetmacro{\inc}{\size+\sep}
\newcounter{col}
\newcounter{row}
\foreach \colname in \colnames{
\setcounter{row}{0}
\foreach \rowopacity in \rowopacities{
\draw ({(\thecol-1)*\inc pt},{\therow*\size})
rectangle ++ (\size,\size);
\node[text=black!\rowopacity] at ({(\thecol-1)*\inc+\size*0.5 pt},{\therow*\size+\size*0.5}) {\colname};
}
}
\end{tikzpicture}%
}
\begin{document}
\genkoyoshi{100,66,33,0,0,0,0,0,0,0}{a,b,c,d,e,f,g,h,i,j,k}{8mm}{2mm}
\end{document}


• The list 100,66,33,0,0,0,0,0,0,0 gives the opacity of each row -- 0 is transparent, and 100 is completely black. The length of that list gives the number of rows, hence the 0 fillers at the end.

• The list a,b,c,d,e,f,g,h,i,j,k gives the character you want in each column.

• The 8mm is the height and width of each cell, and the 2mm is the size of the gap between columns

• The notation black!40 gives a colour that is 40% black and 60% white.

• Each letter is centred horizontally and vertically in its cell, which is why the g looks a bit high and the d looks a bit low. If you don't like this, change {\colname} on line 20 to {\strut\colname}.

## Result

• Wow! This is exactly what I'm looking for, thanks. Wish me luck in deciphering/understanding the code May 20, 2013 at 11:16
• Good luck! (I added a few explanatory comments.) May 20, 2013 at 12:39

I found a suitable basis in How to color the font of a single row in a table?

\documentclass{article}
\usepackage{tabu}
\usepackage{xcolor}

\begin{document}
\begin{tabu}{ |l|l| l| l| l| } \hline
\rowfont{\color{gray!90}}    0   & 1 & 2 & 3 & 4 \\  \hline
\rowfont{\color{gray!80}}        1   & A & B & C & D \\ \hline
\rowfont{\color{gray!70}}        2   & A & B & C & D \\ \hline
\rowfont{\color{gray!60}}        3   & A & B & C & D \\ \hline
\rowfont{\color{gray!50}}        4   & A & B & C & D \\ \hline
\rowfont{\color{gray!40}}        5   & A & B & C & D \\ \hline
\rowfont{\color{gray!30}}        6   & A & B & C & D \\ \hline
\rowfont{\color{gray!20}}        7   & A & B & C & D \\ \hline
\rowfont{\color{gray!10}}        8   & A & B & C & D \\ \hline
\end{tabu}
\end{document}


For right-to-left, the columns may be counted first, then the character position is as a delta of the column-total.

MWE

%babel
\documentclass{article}
\usepackage{xcolor}
\usepackage{fontspec}
\usepackage[japanese]{babel}
\babelfont{rm}{Noto Serif CJK JP}
\usepackage{tikz}
\pagestyle{empty}
\newcommand\genkoyoshi[4]{%
\def\rowopacities{#1}%
\def\colnames{#2}%
\def\size{#3}%
\def\sep{#4}%
\begin{tikzpicture}[yscale=-1]
\pgfmathsetmacro{\inc}{\size+\sep}
\newcounter{ltotal}
\foreach \n [count=\y] in \colnames{
\setcounter{ltotal}{\y}}
\newcounter{col}
\newcounter{row}
\foreach \colname in \colnames{
\setcounter{row}{0}
\foreach \rowopacity in \rowopacities{