@xyzzy The new name doesnt click for me actually. It feels much more weird than normal. Ik it is common to switch names during official translation, but this one feels weird.
>Plus, Kaiju often makes people think of giant monsters, and if the title refers to the main character, he ain’t giant-sized.
Huh? This manga is centered around Kaijus, a giant monster. That's the point of the title, to visualize that what the type of monster they are seeing aren't normal sized ones, rather big ones. This also centers on a man who are able to gain powers of these gigantic monsters in his own small body, without altering too much. Also, some Kaijus are able to change their size like Balatan from Ultraman.