Install ddskk. I try ddskk for skk tutorial.

0_INSTALL.sh

wget http://openlab.ring.gr.jp/skk/maintrunk/ddskk-15.1.tar.gz
tar xvf ddskk-15.1.tar.gz
cd ddskk-15.1
echo '(setq SKK_DATADIR "~/.emacs.d/etc/skk")' >> SKK-CFG
echo '(setq SKK_INFODIR "~/.emacs.d/info")' >> SKK-CFG
echo '(setq SKK_LISPDIR "~/.emacs.d/elisp/skk")' >> SKK-CFG
echo '(setq SKK_SET_JISYO t)' >> SKK-CFG
make install EMACS=/Applications/Emacs.app/Contents/MacOS/Emacs

init.el

; ddskk
(add-to-list 'load-path (expand-file-name "~/.emacs.d/elisp/skk"))
(require 'skk-setup)
(require 'skk)

; skk tutorial file
(setq skk-tut-file "~/.emacs.d/etc/skk/SKK.tut")

; skk dict
(setq skk-jisyo "~/.emacs.d/etc/skk/SKK-JISYO.L")
(setq skk-backup-jisyo "~/.emacs.d/etc/SKK-JISYO.L.backup")

(require 'info)
(add-to-list 'Info-additional-directory-list "~/.emacs.d/info")