These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Inoue, using the Manchurian-based artifact to mess up the timeline in the first place. His descendants control access to the crucial artifacts via the namesake's foundation.
Ito Hirobumi is assumed to be this himself. The movie implies that only the lack of his mere genius prevented Japan from entering the war on the Allied side, the nukage of Berlin instead of Hiroshima and Nagasaki, participating in the space race entering the United Nations as a permanent member and still retaining its recently conquered colonies.