kurukuruCaptain

This channel is to provide the video clips which are related to the following service:
(1) SpeedCalendar (How to Calculate the day of the week)
(2) Kurukurukai (One of the most historical Rubik's circle in Japan)
(3) Africa-Japan.com (Bridge between Africa and Japan)
(4) Stoicer.com (Study group for language, programming, qualification, and more.)
(5) Academiathlon (New type of sport which is the combination of Rubik's cube and Triathlon)