Truth be told, Toshiba Japan latest dynabook N300 is in fact a variant of the European version name the NB550 Series announced a few days ago.
Both models feature the exact same specs, same dimension and a nice pair of Harman/Kardon speakers. The only difference maybe is in terms of choice offered to Japanese customers with only three colors available in Japan including, brown, green and orange.

The dynabook N300 comes packed with an Intel Atom N550 proc, up to 2GB RAM(depending on model) and up to 250GB HDD. All that comes in a 10.31×7.46×0.65(front)/1.39(back) inches case [261.9x189.5x16.6(front)/35.5(back) mm] weighing 2.91 pounds [1.32 kg] battery included.