I thought that was a little odd when I was there. That one is an interesting tower -- almost looks like a "modular" unit quickly built up. I have no idea if there was ever a keeper's dwelling with it. There were some houses a few hundred feet away, but nothing too close.
WW2 tie-in: The submarine USS Pickerel was apparently sunk within view of this lighthouse by a ASM attack (can't remember if it was aircraft or naval units -- I think it was aircraft). The other lighthouse (Shiriya) sits at a shipping choke-point (entrance to the Tsugaru Strait) and was attacked by the carrier-based aircraft of TF54 in July of 1945. In that attack the lighthouse was badly damaged and two? of the keepers were killed.
Lighthouse Photography and More: