The Sony Xperia Z1 Compact for the Japanese carrier NTT DoCoMo is titled Z1f there, and codenamed as SO-2F internally. Today DoCoMo started taking preorders of some Xperia A2, which is coincidentally coded as SO-04F. The Xperia Z2 is marked as SO-03F by the carrier, but the specs of the A2 don't really scream Z2 Compact, as was thought before.
The specs seem to be more similar to the Z1 Compact, rather than being worthy of a Z2 Compact, as the A2 sports a 4.3" 720p LCD Triluminos display, a 2.2 GHz quad-core MSM8974 Snapdragon 800 processor, 2 GB of RAM, and Sony's 20.7 MP camera sensor on the back. This looks like a carbon copy of the Z1 Compact specs, though the dimensions are a bit different, at about 128 x 65 x 9.7mm, against 127 x 64.9 x 9.5 mm for the Z1 Compact. We also aren't seeing a speaker at the rear of the A1, like on the Z1f.
The Xperia A2 phone is still waterproof and IP58-certified, but the ability to record 4K video is conspicuously missing from the list of virtues that comes with the handset, while its larger sibling, the Z2, brags and boasts with this functionality. It is available in a couple of bold new colors, for that matter, including lavender and orange, and will be hitting the shelves in mid-June.