The drama SP which is based on the same-titled novel published by Takasugi Ryo in 1986, describes the life of Yatabe Taizo (Ihara) before and after WWII as he grew his small business Okita Gosei Kagaku Kogyo in a small town of Osaka to become the internationally-renowed Nisshoku Kagaku Kogyo. Yatabe was an engineering professor whose company made phthalic anhydride used in the paint for cars and aeroplanes during the war. With his continuous research, guts and strong faith, he overcame many challenges to grow his company while helping his staff to develop their talents. Yatabe was modelled after the founder of Nisshoku i.e. the late Yatagai Taizo.
Co-stars include Shiba Toshio who plays an influential figure Nagata Shigeo in the political and economic world, Toda Naho who plays Yatabe's wife Satoko, Yamaguchi Tomomitsu who plays Sanada Kozo, a shogi player and good friend of Yatabe as well as Ishimaru Kenjiro, Watanabe Dai, Nakamura Yasuhi, Kitami Toshiyuki, Oishi Goro, Uchida Shigeru and Rokkaku Shinji.
Sources: Sanspo / Yomiuri Hochi / Oricon