Any tubes currently manufactured in the US, Japan or Germany?

I guess I would add what does it matter. The design trumps the manufacturing process. A good developer will do the due diligence of the manufacture and conduct follow up quality control checks. So I do not see where this takes place matters. A good tube is a good tube. Actually sad that what you show in your link is the first time in many years anyone has even hinted at upgrading the ancient tech of tubes. Guess we can get a little excited but not over optimistic.

Definitely yes, we’ll see something like this in the future. Compare to modern electronic technology manufacturing of vacuum tubes is not more complicated. The only thing is needed is inquiry for it. The market is focusing even small demands now. 

KR Audio makes tubes and amps in the Czech Republic and they are available in the USA.

http://www.kraudio.com/tubes.html

https://kraudiousa.com/index.php

Sophia Electric are made in China

KR and EAT are made in the Czech Republic

WE are made in the US

Takatsuki are made in Japan

Elrog are made in Germany

KR does make an awesome KT88 and it looks like they will re-introduce a KT150. KT88 is $200 each, KT150 I expect to be ~$450 each. A lot more than Tung-Sols but...at least you can get them. They will develop a KT120 for me but I need to order 1000. More than I am willing to commit to at this point.

JJ is obviously Czech republic but I looked and it appears that they are sold out until June. Not sure if they can produce fast enough to meet demand.

The other not mentioned here is Emission Labs which is also Czech Republic. Jac will also introduce tubes but you need to have a sufficiently large opening order.