Did the Japanese gain or lose territory after the attack on Pearl Harbor?
If you mean because of the attack on Pearl Harbor, then no. But Korea broke away from Japan during WWII.
Answer Pearl Harbor is a military base the Japanese attacked in Hawaii. Pearl Harbor was located in the "US Territory of Hawaii." Hawaii and Alaska were NOT states back then. Answer The Japanese attack on Pearl Harbor on the morning of December 7, 1941. Pearl Harbor is a harbor on the island of Oahu, Hawaii.