In the board meeting in September 2012, it was decided that my essays on the HCD should be uploaded here. As a President of HCD, I'm regularly writing a series of essay on the monthly newsletter of our organization. Essays that will be uploaded here won't be the translation of those written in Japanese, but will include some new ones. Anyways, please note that these essays reflects my own personal view and are not related to any of the official viewpoint of the HCD-Net. So, please enjoy.