What is the busiest subway line in Tokyo?

Okay, so you wanna know the most packed subway line in Tokyo, huh? Ugh, where do I even begin? It's gotta be the Tozai Line. Officially it's Line 5, yeah, but honestly, nobody calls it that. Tozai Line is where it's at, or should I say, where it's at capacity!

Seriously, let me paint you a picture: over 1.6 million people smooshed in there every single day. I mean, can you even imagine? That's more than some entire cities! And yeah, it's officially the busiest line, but that doesn't even BEGIN to describe it.

During rush hour? Forget about it. You're basically a sardine. A very sweaty, potentially claustrophobic sardine. I swear, some mornings I'm crammed in so tight I can barely breathe, you know? Like, is this what it feels like to be shrink-wrapped? It's not fun, let me tell you.

I remember once, I was trying to get to a meeting in Otemachi – already late, of course – and the train just... stopped. Between stations. For like, twenty minutes! People were practically climbing the walls. I thought I was going to lose it. And you know what's worse? No AC! I’m not even kidding. You start questioning if you’ll ever be free again.

Honestly, you'd think with all that crowding they'd, I don't know, add more trains or something? They really need to do something about it. Maybe a parallel line? A teleportation device? Anything would be better than the current situation, that’s for sure. I just want to get to work without feeling like I've wrestled a sumo wrestler in a phone booth, is that too much to ask?