発表時間： [C1] 20分、 [C2] 20分、 [C3] 3時間、 [招待講演] 1時間 （いずれも質疑応答含む）
NOTICE: PPL aims to function as an informal workshop series, which gives researchers an opportunity to disseminate their preliminary work and get feedback from the participants without precluding publication elsewhere. It encourages submissions of revised versions of the work to international conferences or refereed journals.
The second category of PPL ([C2] in the program above) is intended to help researchers disseminate their research to the domestic community by providing an opportunity to present their papers that have already been accepted by international conferences or journals (but not presented in Japan before). Therefore, presentations in this category, which are informal, should not be considered republication or results of double submissions of any kind.