Looking for Yuji Umeki

I'm trying to find a close friend Yuji Umeki who I met while stationed at MCAS Iwakuni in 1986-87 and again in 1989-90. He was in the JMSDF. I lost contact with him after leaving in 1990. Any information would be appreciated. I'm going back to Iwakuni in July and would like to get in touch with him if possible.