[IIsi50MHz]

There is long-standing tradition that if a company's "core competency" is retained, it remains the same company. And also of adults being adopted into a family (including when done as a means of producing a successor when there is no suitable heir).

So, a family of weavers going back hundreds of years, now switching to carbon fibre production under the direction of an unrelated (adopted) heir can said in Japan to still be the same company if that carbon fiber is woven.

But also, sometimes "core competency" is re-interpreted. Perhaps the original core competency was as dyers, which morphed into weaving at some point, and might eventuall change to "anything involving carbon fibre"…