Some Japanese woman broke this on her twitter feed:
I was on a Commuter train, in Japan it can get incredibly crowded at rush hour, when sometimes even one station employee passenger pusher isn’t enough to get everyone aboard. Being in such close proximity to so many other people can make for an uncomfortable ride to work or school, and it doesn’t get any more pleasant if you happen to also be in close proximity to someone’s fart. this guy beside me was fighting with his girlfriend and The guy broke out in a sweat but fired back with ‘You’re the one who farted! Don’t try to blame other people!’ It made the mood in the train so tense and hostile. Can’t we all just stay cool and get along?” The smell was so bad that it smelted of eggs for about 45 minutes.