Regarding the earlier 1924 version of Taiho-jutsu, here is an excerpt from 'Modern Budō & Bujutsu' by Donn F. Draeger (1974)
"Taiho-jutsu
Many urgent problems had to be solved before the modern Japanese police force could carry out its important mission. Neither the severe martial techniques of classical bujutsu nor the spiritually oriented ones of classical budō proved to be entirely useful in their pure on in pie i pot a ta time a the late Meiji era, the modern disciplines of kendo and judo have been useful to the Japanese police primarily as systems of physical education. It remained essential that the police design their own formal systems of hand-to-hand combat that would be more appropriate methods of self-defence.
A technical study committee was convened by the Tokyo police bureau in 1924.
The committee members consisted of high-ranked swordsmen who were exponents of kenjutsu, kendo, and iaidō and specialists in goshin-jutsu (self-defense methods of jūjutsu and jūdō). Members of the former groups were Nakayama Hyakudo, Hiyama Yoshihitsu, Samura Goro, and Hotta Shitejiro; Nagaoka Shuichi, Mifune Kyuzo, Nakano Seizo, Sato Kinosuke, and Kawakami Tadashi represented the latter group.
This committee devised a series of self-defence techniques based on unarmed defence and recommended that these techniques be taught to all policemen. The police board approved the techniques and incorporated them into police training procedures with the proviso that the techniques be given extensive study and testing."
Details of the Draeger's writings on post-war Taiho-jutsu to follow.