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SparkRoam plans for Japan

6,108 live plans from 63 providers, ranked on what a gigabyte actually costs rather than on the sticker price. Checked 13 October 2026

Compare 6,108 plans →
$0.22 Lowest per GB Cheapest honest gigabyte here
$1.93 Median per GB Unlimited and fair-use excluded
$1.12–4.09 Typical band Where most plans land
56% Advertise 5G 61% allow hotspot

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Compare 6,108 plans

We earn a commission on some links below. Commission carries zero weight in the ranking formula, which is published in full. Prices are indicative and the provider's own checkout is always authoritative.

Showing 24 of 6,108 plans

View offer: SparkRoam, Japan · 21 GB · 7 days 1 SparkRoam Japan · 21 GB · 7 days 21 GB 7 days 4G Japan only $10.35 $0.49 per GB
View offer: SparkRoam, Japan · Unlimited · 7 days 2 SparkRoam Japan · Unlimited · 7 days Unlimited 7 days 4G Japan only $14.12 —
View offer: SparkRoam, Japan 50GB 30Days 3 SparkRoam Japan 50GB 30Days 50 GB 30 days 4G Japan only $22.70 $0.45 per GB
View offer: SparkRoam, Japan eSIM 50 GB 30 Days 4 SparkRoam Japan eSIM 50 GB 30 Days 50 GB 30 days 4G Japan only $22.70 $0.45 per GB
View offer: SparkRoam, TOPUP • Japan 5 SparkRoam TOPUP • Japan 50 GB 30 days 4G Japan only $22.70 $0.45 per GB
View offer: SparkRoam, Japan 10GB 30Days 6 SparkRoam Japan 10GB 30Days 10 GB 30 days 4G Japan only $6.71 $0.67 per GB
View offer: SparkRoam, Japan eSIM 10 GB 30 Days 7 SparkRoam Japan eSIM 10 GB 30 Days 10 GB 30 days 4G Japan only $6.71 $0.67 per GB
View offer: SparkRoam, TOPUP • Japan 8 SparkRoam TOPUP • Japan 10 GB 30 days 4G Japan only $6.71 $0.67 per GB
View offer: SparkRoam, Japan eSIM 3 GB 15 Days 9 SparkRoam Japan eSIM 3 GB 15 Days 3 GB 15 days 4G Japan only $2.81 $0.94 per GB
View offer: SparkRoam, Japan eSIM 3 GB 15 Days 10 SparkRoam Japan eSIM 3 GB 15 Days 3 GB 15 days 4G Japan only $2.81 $0.94 per GB
View offer: SparkRoam, TOPUP • Japan 11 SparkRoam TOPUP • Japan 3 GB 15 days 4G Japan only $2.81 $0.94 per GB
View offer: SparkRoam, Japan 3GB 30Days 12 SparkRoam Japan 3GB 30Days 3 GB 30 days 4G Japan only $2.94 $0.98 per GB
View offer: SparkRoam, Japan eSIM 3 GB 30 Days 13 SparkRoam Japan eSIM 3 GB 30 Days 3 GB 30 days 4G Japan only $2.94 $0.98 per GB
View offer: SparkRoam, TOPUP • Japan 14 SparkRoam TOPUP • Japan 3 GB 30 days 4G Japan only $2.94 $0.98 per GB
View offer: SparkRoam, Japan 20GB 30Days 15 SparkRoam Japan 20GB 30Days 20 GB 30 days 4G Japan only $11.26 $0.56 per GB
View offer: SparkRoam, Japan eSIM 20 GB 30 Days 16 SparkRoam Japan eSIM 20 GB 30 Days 20 GB 30 days 4G Japan only $11.26 $0.56 per GB
View offer: SparkRoam, TOPUP • Japan 17 SparkRoam TOPUP • Japan 20 GB 30 days 4G Japan only $11.26 $0.56 per GB
View offer: SparkRoam, Japan · Unlimited · 30 days 18 SparkRoam Japan · Unlimited · 30 days Unlimited 30 days 4G Japan only $48.67 —
View offer: SparkRoam, Japan · Unlimited · 25 days 19 SparkRoam Japan · Unlimited · 25 days Unlimited 25 days 4G Japan only $40.81 —
View offer: SparkRoam, Japan · 30 GB · 10 days 20 SparkRoam Japan · 30 GB · 10 days 30 GB 10 days 4G Japan only $14.12 $0.47 per GB
View offer: SparkRoam, Japan · Unlimited · 14 days 21 SparkRoam Japan · Unlimited · 14 days Unlimited 14 days 4G Japan only $23.49 —
View offer: SparkRoam, Japan 5GB 30Days 22 SparkRoam Japan 5GB 30Days 5 GB 30 days 4G Japan only $4.11 $0.82 per GB
View offer: SparkRoam, Japan eSIM 5 GB 30 Days 23 SparkRoam Japan eSIM 5 GB 30 Days 5 GB 30 days 4G Japan only $4.11 $0.82 per GB
View offer: SparkRoam, TOPUP • Japan 24 SparkRoam TOPUP • Japan 5 GB 30 days 4G Japan only $4.11 $0.82 per GB
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