It is true that Watochama's popularity in Japan is quite low due to the language barrier.
It is rarely seen on the various anonymous forums in Japan (5chan, Anti-Sugiura, Futaba).
The language barrier is the same for other ENs, but the timing of the delivery and the native-speaker-like pronunciation make it even more of a disadvantage.
In Japan, there are a lot of Japanese-speaking V's, so it can't be helped.
(On the other hand, in Japan, they don't know about 4chan's EN antics and flames, so Takamori has no presence in Japan after returning to Chiara, except for releasing new songs.)
However, the reason why there is a certain number of dedicated fans and topics in Japan is because Watochama delivers visually interesting and challenging things even if you don't understand the language.
Recently, karaoke (collaboration style and small Ame Spin), new outfits, and 3D have become hot topics that Japan should learn from.
EN is probably the most popular "質ですsitudesu" on 5chan (situ = quality = KINO).
I hope that Wato will lead EN more with the announcement soon after this.
Oh, yes, please tell me one thing. Why is the Ryan Gosling stuff that is bizarrely applied only to Watson here so entrenched?