Did Japan lack the capacity for mass production?

Was Japan's technological weakness an inability to implement and mass-produce its inventions?

Japan used mass production before and during the war. Difficulties with particular technologies and production priorities cannot be generalized into an inability to manufacture at scale.

A viewer distinguishes technological invention from the ability to manufacture and apply it. Japan already used mass production before and during the Second World War, even though it could not produce every advanced component in quantity. Difficulty with particular components therefore does not establish an economy-wide inability to manufacture at scale. The criticism concerns which products Japan developed and prioritized, alongside the practical problems of implementing new technology.