I have always found it somewhat amusing in Mirai Sentai Timeranger that the method of transporting things through time involves them being punched through a time gate by a giant robot.
Also that apparently time isn’t entirely linear as to get from the year 3,000 to the year 2,000 involves traumatizing dinosaurs in the Jurrasic:
Giving Pharoah and his men a close encounter in Ancient Egypt:
And messing with a Ninja castle siege during the Sengoku Period:
It seems more like they are heading from the past to the future. Are the Timerangers really from the future or from one of those ancient, super high tech lost civilizations from the distant past? Or maybe time really is circular and they have to take the long way around to get where they need to go.