From the shapes of her portlights and the way the factory-original green/red nav lights are attached to the stem, it appears that she was built between late 1983 and the end of 1988.
It is said that the current owner made a purchasing trip to U.S, most possibly to the west coast, years ago then transported her to Japan on a freight ship. Her original hull color might have been white or beige.
It appears that she is very much loved by her owner and by the fellow boaters in and around her marina.
Update: October 2011 from owners son Shin Ishiguru:
She was transported to Japan in 1995 original hull color was white then on her 20th birth year (also My Dad's 60th birth year) we painted her red.
She is very much loved by family and friends in Sagami Bay
We are very happy to have her in our family.