i-mode

» see nttdocomo.co.jp/imode as it lived, on the wayback machine

~ the goodbye ~

i-mode never reached turkey at meaningful scale. it was a japan-coded product at the carrier layer and the content economy, all the way down to the handset hardware. you needed a docomo phone and a docomo plan to use it. that meant being inside the docomo billing relationship from the start. none of those things were available to me. the closest version of mobile internet i had was wap on a nokia in 2003, paying per kilobyte to look at a four-line text page about football scores.

ntt docomo launched i-mode on february 22, 1999. the design was the opposite of the western wap stack. instead of trying to make existing web pages render on a tiny screen, docomo defined its own subset of html called c-html and shipped it to phones built for the protocol. payment was handled by the carrier directly through the monthly bill. only a curated default menu of approved sites was reachable from the home button, with docomo taking a cut of every transaction. the model worked because docomo controlled the entire vertical and the japanese market was big enough to support it standalone.

by june 2006 over 80 million japanese subscribers were using i-mode or one of its operator clones at au and softbank. it was the first place in the world where regular people paid for parking and read manga from a phone. then the iphone arrived in japan in 2008 on softbank, and reached docomo itself in 2013 after years of resistance. the open mobile web replaced the curated mobile web, the way it always does. ntt docomo finally announced the end on october 29, 2019, with a six-and-a-half year wind-down. the service ended on march 31, 2026.

~ the chronicle ~

~ how it landed ~

the timing was the lucky part. docomo went live with i-mode about eight years before the iphone existed. for those eight years japan had a working mobile internet that the rest of the world only had in a worse, slower form called wap. tokyo commuters were reading novels on a phone in 1999. western tech press treated this as exotic for years and missed the actual lesson, which was that carrier-controlled vertical integration was the only thing keeping the user experience coherent at that hardware tier.

~ why it stayed in japan ~

docomo did try. between 2002 and 2007 i-mode launched in seventeen countries via partner carriers including o2 in europe and kpn in the netherlands. handset support was the rate-limiter. european manufacturers had to build c-html and i-mode-spec phones for what was effectively one carrier per country, and the volumes never justified the engineering cost. by 2010 every european partnership had quietly ended.

~ the long tail ~

i-mode is the technology people point at when they want to argue that the open mobile web won by accident. its designers got every major decision right for 1999. they got every major decision wrong for 2010. carrier walled gardens are now treated as a failure mode, but for almost a decade i-mode was the cleanest user experience in mobile computing anywhere on earth. the iphone made it look obsolete in a year.

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