Japan’s traditional “garakei” phones faded over many years, not in a single national switch-off. Smartphones became the norm while carriers retired the older 3G networks that many classic feature phones relied on. That did not mean every clamshell handset disappeared: newer feature phones can use different networks, and compatibility depends on the model and carrier.
What changed—and what “garakei” meant
“Garakei” is a nickname for Japan’s distinctive pre-smartphone mobile phones. They often had a clamshell design, but their defining feature was not simply the shape. They belonged to a mobile ecosystem built around carrier services, including internet access and email, before smartphones became dominant.
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Docomo launched i-mode in February 1999, bringing internet access and email to mobile phones. By July 2010, it had about 49 million i-mode contracts, a measure of how substantial that early mobile-internet ecosystem became. Docomo launched its FOMA 3G service in October 2001; it reported about 57 million FOMA contracts in 2011. Docomo’s company history records these milestones.
So the change was not simply from a basic phone to a phone with internet. Japan’s older handsets already offered connected services; what changed was the technology, services and devices people increasingly used to access them.
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When did Japan switch from flip phones to smartphones?
There was no single date when Japan switched. NTT Docomo’s Mobile Society Research Institute tracked smartphone ownership among mobile-phone owners at about 4% in 2010, more than half in 2015, over 80% in 2019, over 90% in 2021, and 98% in its January 2025 survey. The institute’s measure counts a smartphone held as either a first or second device and includes tablets, so it is not a smartphone sales figure or a claim that 98% used smartphones exclusively. The 2025 survey covered people aged 15–79 and received 6,962 valid web responses. The institute’s 2025 survey explains the measure and results.
The iPhone 3G’s release in Japan through SoftBank in 2008 was one marker in the transition, but it does not establish that one device caused the nationwide shift. Smartphone adoption rose over years as the mobile market and network infrastructure changed.
Why did carriers retire 3G?
As 4G/LTE, VoLTE and later 5G expanded, carriers had less reason to keep older 3G networks running for a shrinking group of customers. Docomo cited the spread of 4G, declining FOMA and i-mode contracts, and the decision to concentrate resources on 5G. SoftBank likewise described the wider industry factors as greater adoption of 4G/LTE and VoLTE, fewer 3G users, and more effective use of spectrum.
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Docomo announced its decision in 2019, saying in its corporate explanation that declining subscriptions amid 4G’s spread and a focus on 5G resources were reasons for ending the service. That is the carrier’s stated rationale, not an independent assessment. The announcement and service details are on Docomo’s FOMA and i-mode service notice.
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When did Japan’s major carriers shut down 3G?
The shutdowns happened at different times rather than on one shared national deadline.
| Carrier | 3G service end date | Qualification |
|---|---|---|
| KDDI | March 31, 2022 | Its 3G service ended on this date. |
| SoftBank | April 15, 2024 | At the time, SoftBank reported an exception for Ishikawa Prefecture following the Noto earthquake. |
| NTT Docomo | March 31, 2026 | FOMA and i-mode ended on this date. |
Carrier announcements document the KDDI shutdown, SoftBank shutdown, and Docomo’s FOMA and i-mode closure.
Why did people replace their phones?
There was no single reason that applied to every owner. In the institute’s January 2025 survey, 52.1% of respondents cited battery deterioration as a trigger for replacing a phone. Docomo’s 2022 white paper also identifies price and low communication charges as long-standing priorities in phone replacement decisions. These findings describe broader replacement factors; they do not directly establish why former garakei users chose smartphones. The 2025 survey and Docomo’s 2022 white paper provide those figures.
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Do Japanese flip phones still work?
There is no blanket yes-or-no answer. The 3G closures mean a handset that depends on a retired 3G service cannot use that service after shutdown. But a clamshell design alone does not tell you which network a phone supports, and the closure of 3G does not establish that every flip-style handset stopped working. A particular phone’s usability depends on its network generation, carrier compatibility and continuing service support. The carrier dates above do not provide a model-by-model compatibility list.
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