As reported by Rob Coppinger the JAXA's spaceship is a transformer: it dramatically reconfigures itself after the launch.

Unbelievable. Clearly someone watched too many Macross series.

UPDATE: Dr. Antonio Elias of OSC says:

That way the crew module can have an itsy bitsy hatch to go to the (pressurized) cargo module which, itself, attached to ISS via a CBM. Clever, really clever (it's Apollo/LM without the docking dynamics) but (Gulp!) I hate to think of the weight of that mechanism, never mind its failure modes...