The real Hurt Locker? Lock up your cats?

Ok, this one (look at the picture) had me quite confused for some time and I think that I might finally have figured out what it's about. But to give all my readers enough context to consider this themselves; this picture was taken from a locker at a standard row of bag lockers in one of the shopping malls in Odaiba (yep, it was taken at this time). Nothing special about the row of lockers except for this sign plastered on one of the top lockers.

It literally says "This is a cat locker", "This is the cat locker" or "This is a locker for cats", the Japanese language is a bit ambigious when it comes to stuff like this so I can't say for sure what was meant. But it was nothing special about this locker and nothing at all that made me think that it would in any way be a suitable place to put a poor little cat inside for storage purposes (and yeah, even if you did bring a cat to Odaiba, would you put it in a locker even if they had special ones?).

Then below that text it says in a bit smaller letters "we are the mark". This confused me for quite some time, but I think I finally figured it out; the cats must be the symbol for that section of lockers and probably there to differentiate this row of lockers from the bunch of other locker areas. I did not look, but I guess there must be "The dog lockers" and maybe even the "Elephant lockers" in other areas of the mall.

But the next time I happen to bring a cat I want to put away while shopping, I might just use this particular locker just in case that it's actually meant for cats and it was just 100 yen in any case! If anyone happen to have the definite conclusion to this one please let me know since I am quite curious!