commuter train packer, "train stuffer" (person who helps stuff people into packed rush hour trains in Japan so the doors can close)

passenger

to push into; to cram into

an electric multiple unit train

to push; to thrust; to shove / to press / to stamp / to focus one's attack / to ignore an injury

to see, to watch, to observe, to look at something / to look over, to examine, to judge / to take care of, to look after, to keep an eye on somebody

disgraceful, shameful, indecent / shabby, unsightly

in a flash, in an instant

inside

中々: very, quite, considerably, rather, by no means (with negative verb)