LaTeX seems to ignore `hbt!` float

I want three figure environments to be positioned side by side and I tried to add hbt! float to each figure environment to achieve this. However, only the first figure environment is positioned at the right place and the latter two are somehow positioned at next page, with a text of next section being inserted between the first environment and second environment. LaTeX seems to ignore hbt! for the latter two.

How can I three figure environments to be positioned side by side? As long as the three row comes side by side like a table, I don’t care the way.

I’ll show you a part of my LaTeX code:

my preample:

documentclass{jsarticle}

usepackage[dvipdfmx]{graphicx}
usepackage{subcaption}
usepackage{amsmath,amssymb,bm,braket,ascmac}

figure section:

begin{figure}[hbt!]
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig1.jpg}
    caption{fig1}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig2.jpg}
    caption{fig2}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig3.jpg}
    caption{fig3}
  end{subfigure}
  caption{figures}
  label{fig:first_environmet}
end{figure}
begin{figure}[hbt!]
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig4.jpg}
    caption{fig4}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig5.jpg}
    caption{fig5}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig6.jpg}
    caption{fig6}
  end{subfigure}
  caption{figures}
  label{fig:second_environment}
end{figure}
begin{figure}[hbt!]
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig7.jpg}
    caption{fig7}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig8.jpg}
    caption{fig8}
  end{subfigure}
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig9.jpg}
    caption{fig9}
  end{subfigure}
  caption{figures}
  label{fig:third_environment}
end{figure}

documentclass[demo]{article} % remove 'demo' option in real doc.
usepackage{graphicx,subcaption}
begin{document}
captionsetup[figure]{skip=0.5baselineskip}
begin{figure}[p]
begin{minipage}{textwidth}
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig1.jpg}
    caption{fig1}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig2.jpg}
    caption{fig2}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig3.jpg}
    caption{fig3}
  end{subfigure}
  caption{figures}
  label{fig:first_environmet}
end{minipage}

bigskip
begin{minipage}{textwidth}
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig4.jpg}
    caption{fig4}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig5.jpg}
    caption{fig5}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig6.jpg}
    caption{fig6}
  end{subfigure}
  caption{figures}
  label{fig:second_environment}
end{minipage}

bigskip
begin{minipage}{textwidth}
  centering
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig7.jpg}
    caption{fig7}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig8.jpg}
    caption{fig8}
  end{subfigure}quad
  begin{subfigure}[b]{0.2linewidth}
    includegraphics[width=linewidth]{fig9.jpg}
    caption{fig9}
  end{subfigure}
  caption{figures}
  label{fig:third_environment}
end{minipage}
end{figure}
end{document}