Very true. As it was, the Germans provided the means to build a licensed version of the Me-109, which became the Kawasaki Ki-61 fighter. It was so advanced in both concepts and required production quality (on top of an already overloaded Japanese industrial machine) that it was nothing but trouble for the Japanese until the last months of the war, by which time it made little difference.
I wonder if the Germans ever tried to provide the means for Japanese-made Panzerfausts....
I am sure you know this, that is why there was zero chance the Imperial Japanese were going to invade Soviet Russia. Zhukov using tanks, armored cars, and artillery wiped out a Japanese division in Manchuria. The hope the Japanese had was to go south with the strongest arm of its military, the Navy and its carrier force.
Actually, they did, kind of:
As part of military-technical cooperation with Germany in 1941, documentation was received for the Panzergranate 30 (G.Pzgr.30) anti-tank 30-mm cumulative grenades. Japanese designers adapted the Panzergranate 30 for their production capabilities and created the Type 2 rifle grenade launcher...The Type 2 grenade launcher was mounted on Japanese 6,5 rifles mm Type 38 and 7,7 mm Type 99.