日本、〒332-0017 埼玉県川口市栄町3丁目1−24 JR川口駅2F_改札外コンコース | Meeting point is Kawaguchi Station. Kawaguchi is very close to central Tokyo. You can reach it directly by train from Tokyo Station or Ueno Station in about 20 minutes.
The guide will be displaying the HORI and Company logo.