Did the Axis powers share weapons food and supplies?

Although the German Army was trying to establish control over the Suez Canal region (North Africa); and the Japanese Army was trying to move westward through India (stopped by the British Army and Merrill's Marauders-CBI/China, Burma, India Theater); the ONLY physical contacts they made were in the Indian Ocean, where German U-Boats and Japanese I-Boats (Submarines) would surface and exchange information and material.