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.
Ensemble Dark Horse: Mechagodzilla. While this film and its sequel weren't the most successful entries in the franchise, it proved extremely popular and managed to be the only monster besides Gigan and King Ghidorah to appear in another film, and became Godzilla's most popular enemy behind King Ghidorah.
Fridge Logic: Japan's a series of small islands that are already seriously overcrowded in spots. Why not try to move into, say, Russia or Africa?