Kohjinsha PM is 32 MB flash with intel x86 chip on Windows XP with funny-USB, wifi, bluetooth, and micro-SD. It weighs and 345g and costs about JPY 60,000. (Intel® Atom™ processor Z510 (1.10GHz))
On spec, Kohjinsha looks good but Sharp has easier to type keyboard and nice mouse device as I checked in store. OS wise, Sharp is better since I am going to run Debian later anyway and I do not need to worry about hardware support.
I am leaning toward Sharp... Besides, this will make me learn Ubuntu.