Rare Disease Day Secretariat office (inside ASrid) issue a press release about RDD 2018 in Japan. There are 39 official RDD 2018 events in Japan.
RDD Global Website; https://www.rarediseaseday.org/
RDD Japan Website; http://rarediseaseday.jp/ (in Japanese)
RDD Tokyo Website; http://tokyo.rarediseaseday.jp/ (in Japanese)