sjispdflatex: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/sjispdflatex - from package: texlive-east-asian

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/sjispdflatex - from package: latex-cjk-japanese

You may install the required package with command apt-get install {package}

Error in other languages:
sjispdflatex: bevel nie gevind nie
sjispdflatex: comandă negăsită
sjispdflatex: comando não encontrado
sjispdflatex: commande introuvable
sjispdflatex: command not found
sjispdflatex: käsku ei ole
sjispdflatex: không tìm thấy lệnh
sjispdflatex: komanda nerasta
sjispdflatex: Kommando nicht gefunden.
sjispdflatex: kommandot finns inte
sjispdflatex: komut yok
sjispdflatex: nie znaleziono polecenia
sjispdflatex: níor aimsíodh an t-ordú
sjispdflatex: no se encontró la orden
sjispdflatex: no s'ha trobat l'ordre
sjispdflatex: opdracht niet gevonden
sjispdflatex: parancs nem található
sjispdflatex: perintah tidak ditemukan
sjispdflatex: príkaz nenájdený
sjispdflatex: příkaz nenalezen
sjispdflatex: команда не найдена
sjispdflatex: командата не е открита
sjispdflatex: 命令找不到
sjispdflatex: コマンドが見つかりません