[Torchwatch]

It has a low waist so there should be some ass tunnelling at the rear.
The sides look about 1.5"-2".
The suit is smooth fronted i.e. it has no pouch stitching.
There is no visible branding logo on it.

The design is essentially an Arena design from the 1980's, but the Japanese and Chinese have adapted this basic design to make it their own.

Since it is a print suit, once the stock of printed fabric was used no more could be made so unless someone actually recognises the print design and knows where it comes from without a branding logo we are somewhat lost.

Is the orange marking just visible on the sides a number or part of a logo ? if it is a number that could make this a water polo team suit.

The printing is red and blue onto a white suit which is consistent with water polo supply companies, the position of the red leafy front up the front of the suit is deliberate (hiding a white space), so the suits were printed individually before cutting and sewing, and not just cut from a randomly printed roll.

I'd be looking for a Japanese College Water Polo Team.