Hisashi Sakamaki books & textbook
Kyanon no shigotojutsu : Shūnen ga hito to shigoto o ugokasu
Tōkyō : Shōdensha, 2006. /2006-09-01 Tankobon Hardcover
isbn-10: 4396612737 / isbn-13: 9784396612733
Isu to pasokon o nakuseba kaisha wa nobiru
Tōkyō : Shōdensha, 2005. /2005-07-01 Tankobon Hardcover
isbn-10: 4396612486 / isbn-13: 9784396612481
Kenjin no shigotojutsu : ryūgi o tsuranuku kakugo ga orijinaru no kekka o umu jōshiki o utagatte kabe o yabure
Hisashi Sakamaki; Kazuyoshi Komiya; Hiroshi Ikushima; Kaori Sasaki; Miki Watanabe
Tōkyō : Gentōsha, 2013. /2013-01-01 Tankobon Hardcover
isbn-10: 4344902645 / isbn-13: 9784344902640
