From the second half of the 17th century, a new movement, the "Followers of Classic Methods" ("Kohō-ha"), evolved, which emphasized the teachings and formulas of the Chinese classic "Treatise on Cold Damage Disorders" ("Shanghan Lun", in Japanese "Shōkan-ron"). While the etiological concepts of this school were as speculative as those of the "Gosei-ha", the therapeutic approaches were based on empirical observations and practical experience. This return to "classic methods" was initiated by Nagoya Gen'i (1628–1696), and advocated by influential proponents such as Gotō Gonzan (1659–1733), Yamawaki Tōyō (1705–1762), and Yoshimasu Tōdō (1702–1773). Yoshimasu is considered to be the most influential figure. He accepted any effective technique, regardless of its particular philosophical background. Yoshimasu's abdominal diagnostics are commonly credited with differentiating early modern Traditional Japanese medicine (TJM) from Traditional Chinese medicine (TCM).