Rob - It could be your old bass! It seems like some sort of rosewood body, or could be cocobolo. As far as tear drop inlays go, it has them, but only at the 12th fret. Or do you mean inlaid in the body? I had sort of a strange Hyak once. It was one of the first ones. It was walnut, and on the back of the body near the scroll, had a fancy inlay. It was sort of a cross between a wooden tear drop and a paisley. Very cool! It was serial number 13. I know you like that sort of stuff.
Squirefan - Great looking bass! I notice you are using the 1/4 in jack in the photo. If the bass does not have a power supply, you can use an Alembic power supply and it works perfectly. The Hyak power supply is 36 volts, where the Alembic is 18. I have not had any problems yet, and I have used Hyaks off and on since the late 70's with Alembic power supplies. It gets old putting 4 9-volt batteries in that bass! Besides, that bass has the side LED's! You need a power supply.