I met with Shinya on my first day in Japan/Tokio and it was the best day of the stay because of that. Shinya is a great, fun to talk to guy, that goes out of his way to make you feel great in his country. We had a walk around Shibuya, great dinner and drinks in some local places, and then we ended up in Womb until 6a.m. partying. Even afterwards Shinya still took me for the best ramen I had during entire stay there.
If you want to get to know people, culture and modern-day activities - meet with Shinya and he will take care of you. I strongly recommend this activity! :)

Sachiko was a great host and an expert in Akihabara district. She took me for a long walk around the place, showing me all kinds of places like AKB fan-places, video-gaming places and anime-shops. Then we had a great dinner in a very nice maid cafe.
Sachiko is an interesting conversation partner, and it was a pleasure to spend the time with her.
I definitely recommend to visit Akihabara with an expert like Sachiko.