The Japanese culture of what constitutes acceptable design and production risk was then infinitely more refined than anything contemplated by the U.S manufacturers.
Did Western industry learn? NO....As a kid, I remember cheap Chinese and Hong-Kong toys...the quality went up rapidly. The Old-Guard ,jibed that the Asiatics were just cheap copycats....what a bunch of short-sighted fools.
history repeats.
I remember when Olympus introduced the Gastro-Camera to the world
Their engineering and attention to detail was amazing.
I have maintained from the outset that the GS-Yuasa product will be beyond reproach and i stick by that.
The failure lies in the interface with the aircraft and it's monitoring-charging system....the cells have been operated outside their safe limits.
Over a hundred changed-out batteries since release to service bear testimony to that abuse and Boeing's wilful denial until the smokescreen got too thick.