In 1978 a pair of goats, one of the most ecologically damaging species, was introduced to the island. These have bred and now the goats are a menace to the islands ecology including the moles who have one of the most restricted ranges of any animal in the world.
The island range is currently caught up in a dispute with China and Taiwan on one side and Japan on the other.
The goat population on Uotsuri-jima needs to be wiped out as it may constitute a threat to the Senkaku mole who must be considered endangered by sheer dint of it’s restricted range (no to mention the fact that only one has ever been see). Also another dedicated expedition in search of the mole, to find out if it still exists and what kind of population it has, needs to be carried out. This may prove difficult, but far from imposable under the current political situation.
If China wins the dispute it will doubtless drill for oil and set up a base on the island. This will mean curtains for any surviving Senkaku moles.
The little animals are caught between a rock and a hard place. Currently with China held at bay oil drilling is unlikely. But so long as the goats remain on the island, he moles are under threat.