He has been described as the Japanese Banksy, which is a rather lazy description and basically means he is Japanese and uses stencils, but nevertheless it gives you a rough idea of what to expect.
Aito has also released a set of 3 prints to coincide with the opening of the exhibition which are on sale here. Two of the available prints are shown below:
WHERE: Graffik Gallery, 284 Portobello Road, W10 5TE.
WHEN: Opens Thursday 16th January at 18:30. Other days opening is 11:00 until 18:30.