On docomo plans without overseas data included, such as eximo, irumo and ドコモ mini, docomo's 世界そのままギガ costs ¥5,280 ($33.59) for 7 days in the United States, South Korea, Taiwan, Thailand and France, and the data still comes out of your plan's monthly allowance. Travel periods of 6 to 8 days used a median of 1.38 GB in Bcengi's 2026 sample. Paying as you go, that trip's 1.38 GB costs $2.50 in South Korea at $1.81/GB, metered by the KB. Bcengi is about 13 times cheaper for this trip.
This page is for docomo plans without overseas data included. Prices are as listed on docomo's website, read October 3, 2026.
What docomo charges for data abroad
- 世界そのままギガ, 7 days: docomo charges ¥5,280 ($33.59) in the United States (including Hawaii), South Korea, Taiwan, Thailand and France. For the days you book, docomo charges the full price, however little data the trip uses.
- 世界そのままギガ uses the data of your docomo plan in Japan: what you use abroad also comes out of your monthly allowance.
- 世界ギガし放題, which applies without signing up: docomo charges up to ¥2,980 a day (¥1,980 on a day up to about 24.4 MB). Every day you use data abroad is charged, and a week of such days is 7 x ¥2,980 = ¥20,860 ($132.71) with docomo.
What a 7-day trip costs: docomo or paying as you go
Paying as you go with Bcengi, a trip costs what its data costs. Each line below is a model for a trip of 6 to 8 days: the median (1.38 GB) and the 90th percentile (6.50 GB) from the usage report, times the country's rate on October 3, 2026.
- United States rates: a median 7-day trip (1.38 GB at $1.68/GB) costs $2.32 with Bcengi; at the 90th percentile (6.50 GB at $1.68/GB), $10.92. Against docomo's 世界そのままギガ (¥5,280 for 7 days), the median trip is about 14 times cheaper and the 90th percentile trip about 3 times cheaper; against 7 days of docomo's 世界ギガし放題 (¥20,860), about 57 and 12 times cheaper.
- South Korea, Taiwan and Thailand: a median 7-day trip (1.38 GB at $1.81/GB) costs $2.50 with Bcengi; at the 90th percentile (6.50 GB at $1.81/GB), $11.77. Against docomo's 世界そのままギガ (¥5,280 for 7 days), the median trip is about 13 times cheaper and the 90th percentile trip about 3 times cheaper; against 7 days of docomo's 世界ギガし放題 (¥20,860), about 53 and 11 times cheaper.
- France rates: a median 7-day trip (1.38 GB at $1.19/GB) costs $1.64 with Bcengi; at the 90th percentile (6.50 GB at $1.19/GB), $7.74. Against docomo's 世界そのままギガ (¥5,280 for 7 days), the median trip is about 20 times cheaper and the 90th percentile trip about 4.5 times cheaper; against 7 days of docomo's 世界ギガし放題 (¥20,860), about 81 and 17 times cheaper.
In every destination listed, even a 7-day trip at the 90th percentile costs less paying as you go than the ¥5,280 docomo charges for the week.
For how bundles and pay as you go compare, see bundles vs pay as you go.
What you get with Bcengi
- One reusable eSIM: install it once and use it on every trip.
- A balance that never expires: what one trip does not use is there for the next.
- No plan to pick: you never guess a size before you travel.
- Top up any time, by hand or with auto-refill.
- Your phone number stays on your home SIM for calls and texts; Bcengi is data only.
Questions about docomo overseas data
How much does docomo charge for data abroad?
On plans without overseas data included, docomo's 世界そのままギガ is ¥980 for 24 hours and ¥5,280 for 7 days in these destinations. Without signing up for it, docomo's 世界ギガし放題 charges up to ¥2,980 a day.
Does 世界そのままギガ use my plan's data?
Yes. According to docomo, 世界そのままギガ uses the data of the plan you have in Japan, so what you use abroad comes out of your monthly allowance with docomo, on top of the fee.
How do I use a travel eSIM instead of docomo roaming?
Install the eSIM before you leave, set it as your data line, and turn data roaming off for your docomo line so it does not use data abroad. See turn roaming off on your home line.
How these figures were measured
The usage figures come from Bcengi's 2026 International Mobile Data Usage Report: a stratified random sample of 10,000 travel periods, with usage from January 1 to September 30, 2026. The figures cover every destination in the sample, not one country.
Each trip cost on this page is a model, not a bill: the GB a trip used times the per-GB rate on our pricing page on October 3, 2026. Rates can change; the pricing page always has the current ones.
Yen prices are converted to US dollars at the Federal Reserve's rate for September 25, 2026, 157.18 yen per dollar.
Updated October 3, 2026. Sources: docomo's 世界そのままギガ and 世界ギガし放題 pages; Federal Reserve exchange rates; Bcengi 2026 International Mobile Data Usage Report; Bcengi pricing page.
