Thanks, but I only know Weezer from 2 songs. I actually took peoples advice today and went out. Surprising myself I actually went to 2 bars all by myself. The first bar only had gaijin there and the only Japanese woman was someones girlfriend. It was the video game bar and I wasn't doing too much talking and felt I could be doing more. I walked around looking for bars that had at least a decent number of people in them so I would have people to talk to. I ended up going to an Irish bar and when I walked in all of the bar seats were full so I just sat at a table drinking tea and reading manga. However when 2 people left I asked the waitress if I could move to the bar, rather proud of myself on that one. There were only 2 women there, one had to be in her 50's and the other would most likely never given me the time of day, I did however talk to that 50 year old woman and 3 other Japanese guys and had a great time. Yes I wanted women around my age to talk with but I realized I can't control who is in what bar. Despite there not being any women to flirt with I still had a great time talking to those people at the bar for 2 hours and even missed the last train. It was only a 30 minute walk home and I didn't mind. One guy told me he is there everyday and gave me a flyer for an event they are having next weekend too.
1) You went to an IRISH bar and drank TEA? That is a cardinal sin and you deserve an ass beating.
2) Nothing wrong with banging a 50yo. If you drink enough she might feel like 45, and at least you don't need to worry about getting her pregnant. Plus she might be a really awful mother who stays out at bars all night and has an emotionally-damaged daughter you can creep on if she brings you back to her place.
3) Leave your gay manga crap at home. A guy staring at his stupid comic books does not look approachable. And the number of times a girl is going to approach a guy and say, "Oh, that's SO COOL that you're reading an animated comic book with little girls and talking animals! Wanna come back to my place and fuck??" is exactly NEVER.
You're slowly getting on the right path. Next time, ORDER A FUCKING BEER. A guy who sits at a bar counter and orders a water sets off all sorts of warning signs. If I were a girl I'd assume you were either gay or had date-rape pills up your sleeve. And if you don't drink alcohol, START DRINKING ALCOHOL. If nothing else, you could use the false courage. And next time you rock up to a bar and see there aren't any women at the counter, KEEP MOVING. Nothing wrong with sticking your head in a dozen or so bars in a night.
In my experience, small bars are places where you make friends, and large bars are where you pick up easy ass. There are plus sides to both, but I would suggest you just stick to the large ones and hope for the random encounter. There are a couple of small bars back in Osaka where, during my years living there, I spent two or three nights a week and almost twenty years later I'm still friends with the owners and regulars. We still keep in touch on Facebook messenger and LINE, I pop in whenever I'm back in town, I've watched their kids go from elementary school to the university, watched their businesses expand and if there's anything I need in Japan they take care of it for me...but I never picked up any ass there. Well, once, but that was a freak occurrence. It's generally more difficult to score in an intimate setting where everyone knows everyone else pretty well. Obviously, one of the regulars may introduce you to a friend, and that lends itself toward a relationship, but I avoided that shit like the plague because if/when I fucked up that relationship by being the horrible, drunken, degenerate asshole I was at 25, word would get back to everyone at the bar and I just lost a favorite hangout spot and a lot of friends.
Bigger, anonymous settings with lots of alcohol are my favorite hunting ground. If you're sitting at a bar with a dozen other drunks, none of whom ever plan to see one another ever again after that night, inhibitions are low and opportunities plentiful. I'm assuming you're white so you've already got an advantage, as you just rocking up and grabbing a seat at the bar will draw attention. And you could probably start a conversation with the woman/women next to you with a simple "KONBANWA! GENKI??" as the Japanese will be tickled pink that this stupid gaijin is using Japanese and try to engage you in some sort of dialogue. Then you can use the oldest, lamest but most effective ploy in the book and pretend you're having trouble keeping up the conversation (in English and Japanese) and ask them to help teach you some phrases. They love teaching dumb gaijin some Japanese language skills.
And if you've stopped being a pussy and get really lucky, maybe you can teach one of them what it feels like to get anal in the men's restroom stall of the Blarneystone Irish Pub.