Here is U.S. Army Captain Allan C. Smith the first American graduate of the Kodokan in Japan and instructor to WW1 U.S. Army Infantrymen.
This video link is Pre-WW2 Kodokan Judo and it was heavily dependent upon both atemi waza (striking technique) to set up throws and take downs as well as finishing strikes delivered to downed attackers.
https://youtu.be/vnwb8lSilrIJudo had striking in Pre-WW2 Kodokan Judo.
In addition, notice ‘before’ there was W.E. Fairbairn teaching his military gutterfighting and police defendu (combatives) in post WWI Shanghai China and during WWII, America had WWI Army Captain, Allen C. Smith, teaching the exact same methods to American Infantrymen going off to the trenches of the first world war.
Captain Allen C. Smith, the grandfather of modern military combatives.
The first American graduate of the Kodokan in Japan, when it was still called Kano Jiujitsu in the west.
The first to publish a book in America teaching Japanese Kano Jiujitsu aka Judo to American readers.
It's important to note that although Pre-WW2 Kodokan Judo included atemi waza using hands, elbows, knees and feet, there is no striking of any kind allowed in competitive sport IJF Judo or Olympic Judo.
In fact, the only striking or atemi waza surviving in Kodokan Judo today is preserved in a Kata but is not trained 'live' so many modern Judoka after WW2 had to cross train in kara te or western boxing to cultivate functional, combative, atemi waza.
In the 1943 martial art action film, Blood On The Sun, starring actor/judoka/boxer James Cagney there's very good demonstrations of Pre-War Judo atemi waza (strikes) used to attack or to set up throws during the fight scenes choreography.
Link to the movie, Blood On The Sun, is linked below:
https://youtu.be/3mnWgfM1HDI?feature=shared
The infamous 'Judo Chop' of pre-olympics Judo, ridiculed by the masses, was actually called Tegatana Ate Waza and was directed at the carotid sinus of the neck, the steno mastoid, the trachea, the philtrum under the nose, the nape of the neck, the clavicle, the bicep and the ninth rib to either set up grappling attacks or as a finishing blow, depending upon the target.
Judo once having been proven the most formidable unarmed combat art in it's early era later became sport focused after becoming an Olympic sport.
It's still formidable in it's sport form but many techniques are no longer taught or simply not practiced and atemi waza striking has been removed by most Judo clubs in training. If still taught they're only taught in the form of a kata but not drilled or programmed alongside of goshin jutsu drills.
