Big Mountain ski area in Montana has tons, as do mountains all over the world. When I saw this headline my first thought was "clickbait headline to push climate doomerism". The BBC did not disappoint.
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I suspect you're just talking about small trees frozen over,which are indeed very common (1-3m). The habitat for trees being frozen like that just generally comes with strong winds all-year-round, which hampers their grows.
That's what made the Japanese ones special in the eyes of the people that were interviewed for this article - the gargantuan trees looking like monsters because of the size of the trees
> In the 1930s, we saw juhyo five to six metres [16-20ft] across," Yanagisawa says. "By the postwar decades, they were often two to three metres [7-10ft]. Since 2019, many are half a metre [1.6ft] or less. Some are barely columns."
> The cause is twofold, says Yanagisawa: a warming climate and a forest under attack. The host tree, Aomori todomatsu, suffered a moth outbreak in 2013 that stripped its needles. Bark beetles followed in 2015, boring into weakened trunks. Yamagata officials report that around 23,000 firs, about a fifth of the prefectural side's stands, have died. With fewer branches and leaves, there is little surface for snow and ice to cling to.