一般フォーラム

解決した理由といたしましては，すでに定義されていてエラーがでるものの頭文字のアルファベットを大文字にすることで解消いたしました．プリアンブルに書かれていたものは，次の通りです．

\documentclass[11pt,openany,b5paper,dvipdfmx]{jbook}

\usepackage{emath}

\usepackage{emathP}

\usepackage{emathPp}

\usepackage{emathPs}

\usepackage{ascmac}

\usepackage{fancybox}

\usepackage{fancyhdr}

\usepackage{lastpage}

\usepackage{enumerate}

\usepackage{graphicx}

\usepackage{ulem}

\usepackage{textcomp}

\usepackage{mathcomp}

\usepackage{MnSymbol}

\usepackage{wrapfig}

\usepackage{otf}

\pagestyle{myheadings}

\usepackage{tcolorbox}

\usepackage[top=25truemm,bottom=20truemm,left=20truemm,right=20truemm,margin=20mm]{geometry}

\tcbuselibrary{skins}

\newenvironment{myitemize}{%

\begin{description}}{\end{description}}

\usepackage{tikz,tcolorbox,color}

\tcbuselibrary{skins}

\usetikzlibrary{calc}

\tcolorboxenvironment{myitemizet}{blanker,

before skip=6pt,after skip=12pt,

borderline west={1mm}{0pt}{black!50}}

\parindent=0pt\relax % 「Some text.」と「Mor text.」の先頭のインデントを0にする

\usepackage{enumitem}\setlist[description]{labelsep=1zw,leftmargin=2zw}

\definecolor{bluebg}{rgb}{0.5,0.7,0.84}

\definecolor{trianglebg}{rgb}{0.09,0.41,0.69}

\definecolor{brandblue}{rgb}{0.34, 0.7, 1}

\usepackage{lipsum}

\usepackage{microtype}

\usepackage{roboto}

\usepackage{tcolorbox}

\tcbuselibrary{skins}

\newtcolorbox[auto counter, number within=section]{kento}{%

enhanced,

before skip=\bigskipamount, after skip=\bigskipamount,

size=minimal, left=3cm, top=3mm,right=3mm, toprule=3pt,bottom=3mm,

colframe=cyan!50!gray, colbacktitle=cyan!50!gray, colback=white!90!gray,

title={\large 検討},

attach boxed title to top left={yshift=-\tcboxedtitleheight},

center title, minipage boxed title=2.5cm,

fonttitle=\sffamily\robotocondensed\bfseries\small,

boxed title style={

size=minimal, boxsep=4pt, bottom=5mm,

frame code={

\path[fill=tcbcolback]

(frame.north west) -- ([yshift=2mm]frame.south west) --

([xshift=2mm]frame.south west) -- (frame.south east) --

(frame.north east) -- cycle;

\path[fill=white, draw=tcbcolback, line width=1pt]

([xshift=-5mm-0.5pt]frame.south east) circle [radius=5mm]

node [font=\sffamily\large] {\thetcbcounter};

},

interior engine=empty

},

frame code={

\path[fill=tcbcolframe]

(frame.north west) rectangle ([yshift=-3pt]frame.north east);

}

}

\usepackage{enumitem}

\newcommand*{\listnum}{\sffamily\robotoblack\color{cyan}}

\newcommand*{\textlistnum}[1]{%

\begingroup\listnum #1\endgroup

}

\setlist[enumerate,1]{label=\listnum\arabic*}

\setlist[enumerate,2]{label=\listnum\alph*, leftmargin=1.5em}

\usetikzlibrary{arrows.meta}

\usepackage{amssymb}

\usepackage{changepage}

\usepackage{tcolorbox}

\tcbuselibrary{most}

\tikzstyle{dashedboxone}=[dot pattern=on 1pt off .5pt]

\usepackage{amsmath,amssymb}

\usepackage{pifont,times}

\usepackage{tcolorbox}

\tcbuselibrary{breakable,theorems}

%\tcbuselibrary{breakable} %%を読み込んでいます。

\usetikzlibrary{shadows}

\usepackage{varwidth}

\usepackage{blindtext}

\usepackage{fontawesome}

\usepackage{tcolorbox}

\definecolor{lightgreen}{RGB}{247,253,251}

\definecolor{newgreen}{RGB}{7,94,70}

\definecolor{bordergreen}{RGB}{101,223,190}

\newcounter{mycounter}

\usepackage[utf8]{inputenc}

\usepackage{amsmath,amssymb,amsfonts,tikz,enumitem}

\definecolor{col1}{RGB}{253, 181, 192}

\definecolor{col2}{RGB}{166, 72, 124}

\definecolor{col3}{RGB}{246, 66, 153}

\usepackage{pgfornament}

\tcbuselibrary{skins,hooks}

\usetikzlibrary{shapes.arrows,calc,decorations.pathmorphing}

\usepackage{eso-pic}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\usepackage{xifthen}

\usepackage{nicematrix}

\usepackage{scalerel}

\usepackage{stackengine}

\usepackage{tikz}

\usepackage{varwidth}

\definecolor{BrickRed}{RGB}{144,44,30}

\newenvironment{niceMfbox}[3][-2mm]

{

\vspace{#1}%

\begin{center}

\begin{NiceTabular}{@{\hspace{20pt}}V{#2}@{\hspace{20pt}}}

\bfseries \large

\enspace #3\enspace \\

\RowStyle[cell-space-bottom-limit=8pt]{}

}

{

\CodeAfter

\begin{tikzpicture}

\draw [line width=1pt,rounded corners,BrickRed!75!black]

(1-1) -| (last-|2) -- (last-|1) |- (1-1) ;

\end{tikzpicture}

\end{NiceTabular}

\end{center}

\par \vspace{2mm}%

}

% \widetilde{} alternative for formula over the tilde - \SE

\newcommand\reallywidetilde[1]{\ThisStyle{%

\setbox0=\hbox{$\SavedStyle#1$}%

\stackengine{\LMpt}{%

\stretchto{\scaleto{\SavedStyle\mkern.2mu\sim}{.5467\wd0}}{.7\ht0}%

}{$\SavedStyle#1$%

% .2mu is the kern imbalance when clipping white space

% .5467++++ is \ht/[kerned \wd] aspect ratio for \sim glyph

}{O}{c}{F}{T}{S}%

}}

\usepackage {vwcol}

\usepackage{ceo}

\usepackage{setspace}

\usepackage{varwidth}

% フッターを中央（center）に表示し、内容は

% \thepageを数式モードで囲った出力とする

\cfoot{\sf\thepage}

\newcounter{reidaibangou} %%カウンタの定義

\newtcolorbox{rr}[1][]{enhanced,boxrule=0.5mm,top=8pt,left=15pt,right=4pt,bottom=2pt,arc=0mm,

colback = white,

colframe=ored,

boxrule=1pt,

underlay={

boxed title style={empty,arc=0pt,outer arc=0pt,boxrule=0pt},

underlay boxed title={

\fill[ored!45!white!50!black] ([yshift=-0.3mm]frame.north west)

-- +(-0.4,0) -- +(0,-0.3) -- cycle;}

\node[inner sep=1pt,white,fill=black!50!gray]at ([xshift=3pt,yshift=-15pt]interior.north west) {\stepcounter{reidaibangou}\bfseries\gtfamily \,指\,針\,};},

segmentation code={%

\draw[dashed] (segmentation.west)--(segmentation.east);

\node[inner sep=1pt,blue!50!black,fill=blue!10!white] at ([xshift=22pt,yshift=-8pt]segmentation.south west) {\bfseries\gtfamily 解};},

before upper={\setlength{\parindent}{1zw}},

before lower={\setlength{\parindent}{1zw}},

}

\newtcolorbox{kt}{

fonttitle=\bfseries,

enhanced,

top=0mm,

boxrule=0pt,frame empty,pad at break=0pt,bottomrule at break=0pt,toprule at break=0pt,left=0.8cm,

borderline west={0.7pt}{2pt}{red!70!white,densely dashed},

coltitle=red!50!white,

colback=white,

sharp corners,

}

\newtcolorbox{bk}{

fonttitle=\bfseries,

enhanced,

top=0mm,

boxrule=0pt,frame empty,pad at break=0pt,bottomrule at break=0pt,toprule at break=0pt,left=0.8cm,

borderline west={0.7pt}{2pt}{purple!70!white,densely dashed},

coltitle=red!50!white,

colback=white,

sharp corners,

}

\newtcolorbox{ti}{

fonttitle=\bfseries,

enhanced,

top=0mm,

boxrule=0pt,frame empty,pad at break=0pt,bottomrule at break=0pt,toprule at break=0pt,left=0.8cm,

borderline west={0.7pt}{2pt}{orange!70!white,densely dashed},

coltitle=red!50!white,

colback=white,

sharp corners,

}

\newtcolorbox{fm}{

fonttitle=\bfseries,

enhanced,

top=0mm,

boxrule=0pt,frame empty,pad at break=0pt,bottomrule at break=0pt,toprule at break=0pt,left=0.8cm,

borderline west={0.7pt}{2pt}{cyan!70!white,densely dashed},

coltitle=cyan!50!white,

colback=white,

sharp corners,

}

\newenvironment{renumerate}{\renewcommand{\labelenumi}{%

（\arabic{enumi}）}\begin{enumerate}}{\end{enumerate}}

\newcount\K

\def\ksfor#1{

\K=#1

\ifnum\K=5

\textcolor{ored}{★★★★★}

\fi

\ifnum\K=4

\textcolor{ored}{★★★★☆}

\fi

\ifnum\K=3

\textcolor{ored}{★★★☆☆}

\fi

\ifnum\K=2

\textcolor{ored}{★★☆☆☆}

\fi

\ifnum\K=1

\textcolor{ored}{★☆☆☆☆}

\fi

}

\newcounter{rens}

\setcounter{rens}{88}

\definecolor{ored}{rgb}{0.5, 0.0, 0.13}

\newcounter{reidai}

\setcounter{reidai}{1}

\newtcolorbox{chart}[2]{%

fonttitle = \gtfamily\sffamily\bfseries,

colframe = ored,

colback = white,

enhanced,

boxrule = 0.3mm,

top=2pt,

left=2pt,

right=4pt,

bottom=2pt,

arc=0mm,

title =\, \, 問題,

titlerule = 0mm,

after title=\hspace{4mm}{\AfterText{#1}{#2}},

boxsep=0pt,

right=0pt

}

\newcommand{\AfterText}[2]{%

\tcbox[%

on line,

boxsep=0pt,

colframe = ored!20!white,

colback = ored!20!white,

boxrule=0.3mm,

rightrule=0mm,

top=0mm,bottom=0mm,

left=2pt,

sharp corners,

]

{%

\makebox[.849\textwidth][l]{\bfseries\gtfamily \, \thereidai \relax\hspace{2pt}｜ {#1} \hfill \ksfor{#2}\relax\strut}%

}}

\usepackage{pxeverysel}

\mathversion{normal}

\begin{document}

\chapter{基本理念}
この章では，これまでの経験を踏まえ，「人前で話すor人に教える」際に考えていることをお話しします．その中でも特に大切にしたいキーワードには下線を引きましたので，指標となればいいなと思います．
\section{序章―気づき―}

\end{document}

大変長くて申し訳ございません．一応私の方で確かめさせていただいたところ，\usepackage{ceo}を含むか含まないかの部分でフォントの差が生まれました．また，このスタイルファイル導入前と比べ，段落を分けたときに自動で最初の１文字を開ける処理がなくなりました．このことも参考にしていただけたらと思います．