Different brand, slightly bigger than Lego I have a set of Technic bricks used by an academy for teaching robotics to children.
They are not compatible with Lego (I think that the pitch is 9mm instead of the 8.6mm of the original Lego design).
I would like to buy additional components, so I wonder if there is any known brand or shop that sell these type of bricks (including Chinese manufacturers or AliExpress stores, for example).
Edit: added image. At some components I can read HND##, but searching for HND I only find Haneda airport in Japan
Taking an image from the linked course site and using Google Image Search for reverse image searching, then applying a layer of Google Translate to make sense of the exclusively Japanese results has convinced me that this type of building system is only used in this robotics course in Japan. Nonetheless, the institution seems to sell the sets as standalone products for 28,500 yen, unless I misunderstand the translation results somehow:

At Human Academy's Robot Class, we will increase the number of kits that will be added when advancing the course, based on the standard kit (* 1) that you purchase when you join.
[...]
(* 1) 28,500 yen 〚tax excluded〛