http://dc.watch.impress.co.jp/docs/news/interview/20120326_519765.html
(An interview in Japanese)
It seems that there are still quite some spare spaces inside the body and further minimization should be possible. Besides, the inside of the K-r is also compared. Finally, it can be seen that the Static RAM chip used is from Hynix, a South Korea semiconductor company, but not from Samsung, which is also a major memory manufacturer.
Update (4-21): Here is yet another K-01 disassembly by someone. It seems that the K-01 is just easy enough to disassemble:-
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View Also:-
Disassemble a K-5