The workshop will be held in Kobayashi Hall at KEK. Public transport (bus) will bring you to KEK from Tsukuba Station (organized by Tsukuba Express). More precise information will be provided in Indico page.
KEK is located in Tsukuba city, Ibaraki prefecture, Japan. We have several airports nearby Tsukuba city: Haneda, Narita, Ibaraki airports. Tsukuba city is directly connected with Tokyo prefecture by Tsukuba Express (about 45 minutes). There are also highway shuttle buses from both Haneda and Narita airports to Tsukuba city.
You can also refer the information on KEK website "Access".