[5] Gigo moved from Okinawa to Tokyo with his father when he was 17, and later became a radiographer of the Section of Physical and Medical Consultation of the Ministry of Education.

[6] When his father's Shihan (senior assistant instructor) Takeshi Shimoda died, Gigo assumed his position within the Shotokan organization teaching in various universities.

[4] While the ancient arts of To-de and shuri-te emphasized the use and development of the upper body, open hand attacks, short distances, joint locks, basic grappling, pressure point striking and use of the front kick and variations of it, Gigō developed long distance striking techniques using the low stances found in old style kendo and Iaido kata.

Other technical developments included the turning of the torso to a half-facing position (hanmi) when blocking, and thrusting the rear leg and hips when performing the techniques.

The training sessions in his dojo were exhausting, and during these, Gigo expected his students to give twice as much energy as they would put into a real confrontation.