AFAIK, it was not a practical success at the time. What it did was to drive arms underground and when sengoku jidai was over, to accelerate the demilitarization of the country as whole-- not just the non-samurai, but also the samurai as well. There's a reason why katana was king during the Edo period; the Japanese lost, over time, the technical knowhow to create real battlefield weapons. Hence the absurd, defective cannons cast during the 19th century to drive out the "barbarians."