Board Thread:Wiki Discussions/@comment-1514283-20140911040828/@comment-4912646-20140911185908

TSB for Obito, Madara, and Naruto is the same as Lava Release is for Rōshi, isn't it? A new nature (though it hasn't actually been called that) acquired by becoming a jinchūriki, rather than through genetic inheritance. So if TSB is listed as a kekkei mōra for those three, Lava Release should be listed as a kekkei genkai for Rōshi and Magnet Release for Bunpuku, etc. Nothing in the series itself has ever said whether natures acquired through tailed beasts count as kekkei genkai or not though.