Editor's Message to Special Issue on "Understanding, Technology, and Application of Interaction"

(EC), “Interaction” symposium has been held every year. This symposium consists of general lectures with rigorous peer review as approximately 3 times of selection ratio and a hundred and several tens of interactive presentations, and since all of those are well received, the symposium has been developed as gather-ing over 600 participants in recent years. At Interaction 2012, it gathered approximately 700 participants with the theme of “In-teraction that leads to future” while executed the reformation to change the number of paper pages for interactive presentation from 2-4 pages to 6 pages as a fundamental rule, and then pre-sented 18 general lectures and 154 interactive presentations (in-cluding demonstration of general lecturers). Since studies in re-lation to interaction make rapid progress, it is extremely impor-tant to provide an opportunity for timely discussion culture. For that reason, a special edition for interaction was set in accordance with Interaction 2012 and provided an opportunity to immedi-ately make available in public as extensively collecting presentation papers and related studies for Interaction 2012. 25 outstanding papers among 43 papers submitted for the event were selected and recorded while the author who served as a program committee chairperson of Interaction 2012 became a guest editor and main program committee members for Interaction 2012 as well as those who are deeply related to interaction study became editing committee members. However, the presentations of 10 papers assessed as outstanding by the Interaction 2012 program committee were selected as recommended papers. The break-down was 8 papers from general lecture presentations (top 18.6% for the number of submitted papers) and 2 interactive presentations (top 1.3% for the number of submitted papers). Those papers could be selected and recorded in