IMR has an association called "Kyoyukai" for the purpose of deepening friendship. Many staff and students join this "Kyoyukai" and pay membership fees. We have various events such as Hanami, club activities, beer parties and so on. This "Kyoyukai" is organized on a rotating basis by each laboratory, and finally the responsibility has been handed to Kato laboratory this year. Until last Hanami, we were just participants, just enjoying the Hanami, but this year, as the secretary, we organized the Hanami. We started early in the morning to prepare, set up and clean up for the Hanami, and were finally released from our organizing duties in the evening. After that, we drank at the laboratory until late at night, and the long day was over. It was a very successful Hanami because every IMR member enjoyed themselves very much.