Well, Bonefish was discovered by the Lost 52 Project. Their stated goal is to find "the 52 lost submarines of the US Navy in WWII." That would then presumably have them search anywhere they suspect a US sub lies (and where they can obtain permission, if necessary.) So, my answer would be that--as long as Japan grants permission--there will be more work there, however, limited to searching specifically for USN targets suspected of being in Japanese waters.

Now... Since they've also found a couple of US destroyers and a Japanese ship, while they are after "USN targets"--specifically US subs--"what they're searching for and what they actually find" are separate but related. They're after US subs. They will just as happily reveal all else they come upon.

https://www.lost52project.org/

https://www.lost52project.org/Bonefish-Expedition.html