2) can't log in to the forum - I've posted a few ideas on the front page. It seems most of these problems have gone away in time. Any other ideas?
3) no backed up ID - This is referring to the users who signed up while the old site had a red banner last week. (sorry it took so long!) I'm afraid you will have to signup again. HOWEVER, you can easily copy and paste any posts from the old site by going to http://old.thejapanesepage.com.
4)文字化け - in the shoutbox. Yes, this is a small problem. It is either mojibake or let the column get really whacked out if someone posts a long word like a URL. I added a line in the code to cut long words (like URL) in half, but it also breaks Japanese often. Not sure what to do here.
5)Twins? - Try logging out, request new password as original username and change password.
6) re-log in "I have to re login in order to post, what could be the problem? " I'm not sure... Anyone else have this problem?
7) newest threads column - I would like to add a newest threads column on the front page soon. See below

9) 500error I think there will be good news on this soon. 1and1 did some work on the server today (that is why it was down.) I still haven't gotten their report yet, but the site seems to be better. If I don't hear from them in the next few hours, I'll call again.
10)Timestamp It was suggested to change the timestamp to something similar to the old site. I did that, but I think you can update it in your user control panel. Let me know what you think is best.
11) Delete Forum posts I *think* I fixed this. Please let me know.
12) Blank white page - this happens when someone isn't logged into phpBB and clicks on the 'login' link at the top right of the forums. The problem goes back to #2 above which hopefully will be resolved in time. I need to hide that link to prevent confusion.
Some of these problems will be solved when phpBB gets its theme. My goal (I don't know if it is possible) is for phpBB to look like the rest of the site with a right and left column. If not, it will at least have a left column with some Drupal blocks like Shoutbox, menu bar and who's online. I will know more after hiring the developer. I will also figure a way to get a newest threads column in drupal.