This copy of the Gamate game “Tennis” has English text on the box and in the instruction manual. It is a re-release of the game, which originates from the time when UMC had taken over the Gamate brand from Bit Corp. You can see this on the back of the box, where UMC has covered the Bit Corp text with a UMC sticker.
What is really special with this variant is the cartridge. On a black border, below the graphics (which has green as background colour, instead of the usual yellow), is the text “UNISYN CORP.” printed. Thanks to the valuable information from ZABORGER in the comment section, I now know that UNISYN CORP. is the previously company name of UMC. Many thanks for that ZABORGER!
There also exists a variant of “Bomb Blaster” with a cartridge that also has the exact same “UNISYN CORP.” print.