Complex sentence: Japan signed the Tripartite Pact on September 27,1940, with Germany and Italy and was therefore part of the Axis Pact; no Japanese people were known to be deliberately imprisoned or killed as they were considered "Honorary Aryans".
Split into simpler sentences: Japan signed the Tripartite Pact with Germany and Italy on September 27,1940, and was part of the Axis. No Japanese people were known to be deliberately imprisoned or killed, since they were considered "honorary Aryans".