Itsuno Koguchi Office Administrator 41st Floor 9-10, Roppongi 1-Chome Ark Hills Sengokuyama Mori Tower Minato-Ku, Tokyo 106-0032 JP Email: [email protected] Phone: +81-3-5562-6238 Fax: +81-3-5562-6202 Add to Contact List Download vCard email current page Download PDF Email This Page Itsuno Koguchi is the Office Manager in the Tokyo office of Simpson Thacher. She has been with the Firm since 2019. Itsuno received her B.A. from Aoyama Gauin University. News & Events See more > Publications See more > Offices Tokyo