Since my response is based on what I saw somewhere in AP thread, you may have to do a little research. However, I recall reading somewhere that this person can go to the U.S. Embassy and request for a letter that would help him/her readmitted to the U.S.
Good luck and I will also do what I can to see if I can dig up the thread that mentions this.
EB3/Japan/Regular Labor Certification
Priority Date: July 31, 2000
I-140 AD: Oct. 7, 2002
I-485 RD: Jan. 03, 2003
I-485 ND: Jan. 06, 2003
1st FP Date: Feb 07, 2003
2nd FP Date: Oct 05, 2004
I-485 RFE sent by NSC: Dec. 15, 2004
I-485 RFE received by NSC: Jan. 31, 2005
I-485 Approved by NSC on: Feb. 07, 2005
PP Stamped in Chicago on: Feb. 24, 2005
Card Received in the Mail on May 28, 2005