Learn basic Japanese and dont expect much on your first visit. I went with my Woman so I had a translator. It was mostly spending time with her family and friends which was cool because I got to practice. Women there are very reserved and if you are tall and handsome they will literally be unable to say anything to you in English or Japanese. Breathless.
One of her friends I had to wait in the hallway with for a minute while my Woman went to get something. She is married, around 35 and still acted like a school girl. Lot of giggling and blushing. Let's just say all her friends would drop their panties in under a minute for me if they were single, but are afraid of what their family and society would think. But every time a Brother comes back to Japan with one of their own it helps. There are a lot of Africans in Japan but not enough educated American brothers repping. They treat you different based more on nationality than anything else. You know Women gossip globally and they will talk about how "Hitomi-chan" got a "Kakoi" guy and is living it up in NYC or LA, wherever. The fact that you are Black is usually an afterthought most times, but the Gaijin aspect is usually what is mentioned first. So the Biggest diffence you need to understand is it's not because we are Black. Unlike in Amerikkka. People in Japan are fearful traditionally of being perceived as "different". There are many reasons for that I can get into later.
There are lots of mentally underdeveloped Women who haven't been exposed to Gaijin (foreigners) much or sophisticated people period. So if you want a same day fukk you got your work cut out for you breh. It is not impossible but the skill threshold for both game and Japanese is really high. Remember if you go to Tokyo many are from other places in Japan and insecure about themselves, if she is young and factor in you're a Gaijin and she's not confident in her English - She'll be overwhelmed.
Try going to Osaka area instead of Tokyo. It's like going to ATL instead of NYC. People will be more friendly and helpful/open. Get a thai massage as soon as you get out of NRT when you get to Tokyo. Your body will thank you. Make sure before that though pick up your Japan Rail Pass AND "Suica" pass BEFORE you leave the airport. Put at least $100 on the SUICA if you will be traveling a lot in local train lines which don't accept JR Rail pass which is regional. Pick up the portable Wi-Fi device pod also BEFORE you leave the airport. Lastly again BEFORE you leave the airport withdraw at least $250 in Yen. The only other place you can withdraw cash without foreign transaction fee is the post office which is more complicated.
There is a lot more but I can message it to you later today if needed. Ganbatte na.
neg pending 
shut that fool down easy.