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@forms
Don't think that's right mate.
I just bought some DA 7600's, and I've been having trouble choosing whether to go for an ISO or JIS tapered BB.
Everyone seems to have a different opinion, and I know people who runs the 7600's with both style taper BBs.
I have come to the conclusion that 7600's are in fact JIS for 2 reasons:
1) Sheldon Brown clearly says that Sugino and Shimano are both JIS, but Sugino njs cranks are ISO (He doesn't say that Shimano's njs cranks are ISO).
2) When I emailed Shimano's FAQ team, they responded by saying; all Shimano cranks are JIS.
There is also an opinion that shimano 7600's are somewhere between ISO and JIS, which means they can be used with both. But the lesser of 2 evils will still be JIS (according to Sheldon Brown), because by using ISO, everytime you take the cranks off the BB and then re-install, you push the cranks further down the spindle, which eventually causes the crank's taper to 'round'.