Abasio plays in Fujisawa (right?!) near Yokohama once in a while well I think he still does?!
I have only tried one trance party in Tokyo, and that was a mixed event with both minimal (cocoon stuff) and dream trance (I think that was what it was called). That was on ageHa back in 2009... and I just checked, it seems they have a just that combination this Saturday 8th... lol and they even have Pig & Dan playing again (was also playing when me and Abasio was there). It's a pretty cool club, huge, great sound and lot's of good looking girls! And if you are lucky an epic pole-dance show?!!?!!
There are many parties happening in Osaka as well, so check them out if you get a chance... I know some people there so if you need a party so I might be able help if you PM when it's time
How long are you staying in Tokyo?