21-Apr-2002 -- This one turned out to be somewhat obvious (see picture). We were visiting Morioka, and I decided to take Route 282 instead of the Tohoku Expressway.
There is a sign on the expressway at 40 degrees north, and within 300 feet is this marker.
My Garmin 12 (WGS 84 datum) said this marker is at N40.00196, E140.99502, or almost 500 meters west northwest of the actual point ... but it's next to the main road.
The road later approaches within 150 meters of the actual point.
Coordinator's note: It seems very likely that this point is actually at the right spot in the Tokyo datum. Since the project uses the WGS84 datum, this point is classified as attempted. We would love a submission of the actual point in the WGS84 datum.