Toyama-ryū (戸山流) established in 1925 by a committee of senior experts of several sword traditions for the curriculum of the Rikugun Toyama Gakkō.
Adopting the katana also served to calm discontent among the more politicized sections of the army who had been outraged at mechanization (another lesson learned from World War I) which had de-emphasized the role of infantry and cavalry.
[citation needed] In 1925, since not all officers had sufficient background in kenjutsu to deploy these weapons in combat, a simplified form of sword technique was devised that emphasized the most essential points of drawing and cutting.
Academy director Lieutenant Colonel Morinaga Kiyoshi (森永清 中佐) selected 5 kata from Nakayama's Omori-ryu to serve as the basis of the "Gunto no Soho".
Today, there are many active instructors of Gunto no Soho and all three mainline Toyama-ryū schools (Moringa-ha, Nakamura-ha and Yamaguchi-ha) inside and outside Japan, licensed by several organizations including the Zen Nihon Toyama-ryu Iaido Renmei (ZNTIR), the Toyama-ryu Iai-Batto Do Renmei (TIBDR), The International Battodo Federation (IBF), the Zen Nihon Battodo Renmei (ZNBDR), the International Shinkendo Federation, The United States Federation of Batto-do (USFBD) and the International Batto-Do Rengo-Kai.