This is correct: The Uncensorship of this game is done by the ARTIST HIMSELF!
Here is a funfact: 072Project doesn't uncensor themselves for your and everyone else's information. The proof is 300% Train Capacity is still Mosaic Censored!
End conclusion: They have to rely on the Artist to have the Uncensored Version of the Art otherwise they'll publish Mosaic Censored.
Go ahead and play the 'swoosh' sound effect for the two of you.
The original is distributed by DLsite. That's why it's censored because it's a Japanese distributor.
072Project is a western distributor which is why it is uncensored.
So yes. The Original version by the developer and original distributor is censored and again...because of laws.
When it was licensed to a western distributor they decided to make a distribution version that was uncensored.
It's up to the distributor and license holder if they want to take on the additional cost and risk to offer an uncensored version with its distribution outside Japan. In this case they did so.
How a distribution company can remove censorship is up to what cost they want to take on. One of those methods is to get the original art from the artist/developer and publish it unchanged. Another method is to apply un-mosaic technology or AI art transformation to restore from the censored image. It depends on what's available and the cost/return the publisher will get as well as the risk they are willing to take.
That's a lot of business nonsense for a porn game post TBH...
All for a throw away jab at people who pop up going 'OMG! Why are games censored! Unplayable!11!!'