On behalf of organizing committee of the International Symposium on Intercalation Compounds (ISIC), we have the honor to invite you to attend ISIC17, which will be held in Sendai, Japan from 12 to 16 May 2013. The focus of the symposium will be on the physics, chemistry, and materials science of intercalated compounds. ISIC started in 1977 in La Napoule, France, and is held biannually. Over 250 researchers from all over the world attended the recent symposiums. Your colleagues or other researchers in the similar fields are respectfully invited to attend the symposium. Detailed information about ISIC17 is available on the web site. We look forward to hosting you in Sendai in May 2013.