This document provides an overview of mobile commerce in Japan. It notes that over 90% of Japanese use their mobile phones to access the mobile web on a daily basis. Operators in Japan control handset makers and SIM-lock all phones, helping drive uniform experiences. They also share significant revenue with content providers. As a result, Japan has seen rapid growth in mobile commerce, reaching over $9 billion in transaction value in 2011, with over 60% of mobile internet users making purchases on their phones. Common purchases include fashion, books/media, and cosmetics. Nearly two-thirds of mobile shoppers prefer paying with cash on delivery. The widespread adoption of 3G and rich messaging services have helped drive this mobile commerce transformation