Mmmm Japan sounds awesome. I think you should start with keeping a dream journal again (if you don't already). Also try to buy a watch that beeps every hour, and everytime it beeps perform a reality check. On top of that try to autosuggest throughout the day, and right before you go to bed.

Right now what seems most important is just building up your recall, that is if you haven't kept it up.

I would also reccomend reading Astral Dynamics by Robert Bruce, its a really good book if you want to increase your WILD abilities.