Today, WWJ’s Portable Reportable presents a mobile marketing case study involving Shizuoka Bank which used the opt-in “Message Free” free email marketing service on i-mode to grab new, younger customers for its “My Car Loan” campaign. Message Free is just one of the mobile marketing services on i-mode operated by D2 Communications on behalf of NTT DoCoMo. This case study is an excellent example of how a wide variety of consumer-facing companies, not just mobile content providers — like ring tone sites or screen image providers — are using the mobile channel for effective marketing via web, pull email, push email, and even interactive voice. Full program run-time: 4:31Portable Reportable audio updates are short, 3- to 5-minute news items in MP3 format. You can listen via PC or download and copy to your portable player for tomorrow morning’s commute. — Eds.