The workshop venue is Room 1D201 and 1D204 (map), Building 1-D in Central Area 1 (map), Tsukuba Campus, University of Tsukuba, as you see in the attached photos at the bottom of the top "Overview" page.
To move from Hiroshima to Tsukuba, it is recommended to take either a flight from Hiroshima Aiport to Tokyo Haneda Aiport or a bullet train (新幹線：Shin-Kan-Sen) from Hiroshima Station to Tokyo Station.
After arriving at Tokyo Station, you can take a highway bus directly to Tsukuba at Tokyo Station or a Tsukuba Express (TX) train at Akihabara Station (秋葉原) on Yamanote-Line (山手線).
From Tokyo Haneda Airport or Tokyo Narita Airport, there is also a highway bus bound for Tsukuba.
Please visit University's route map page for details.
To come to the workshop venue from Tsukuba Station, it is convenient to take a Clockwise-Circular (筑波大学循環右回り, Tsukuba Daigaku Junkan Migi-Mawari) bus at the Tsukuba Center bus terminal (つくばセンター) adjacent to the station. Please get off at "Dai-Ichi Area Mae (第一エリア前)" and come to building 1-D (#40 on this campus map).