SimFinder

Sub-Brand SIM Plans Comparison

Online-focused, low-cost brands operated by major carriers — ahamo, povo, LINEMO, UQ mobile, Y!mobile. MNO-quality network at near-MVNO pricing.

MNO quality, low price ahamo 20GB ¥2,970 povo base fee ¥0 Stable peak-hour speeds Online-first management

19 plans found

2
irumo
86

irumo 0.5GB

0.5GB eSIM
550円 /月
総合スコア: 87.52
irumo
86

irumo 3GB

3GB 5G eSIM
2,167円 /月
総合スコア: 72.14
irumo
86

irumo 6GB

6GB 5G eSIM
2,827円 /月
総合スコア: 65.87
ahamo
86

ahamo 30GB

30GB 5G eSIM Netflix
2,970円 /月
総合スコア: 64.51
irumo
86

irumo 9GB

9GB 5G eSIM
3,377円 /月
総合スコア: 60.64

FAQ

What is the practical speed difference between sub-brands and MVNOs?
Sub-brands use their parent MNO's network directly, bypassing the capacity rental bottleneck that affects MVNOs. Speeds remain more stable during peak hours. For users who want low pricing without compromising on speed, sub-brands hold a clear advantage.
How do I choose between ahamo, povo, LINEMO, UQ mobile, and Y!mobile?
Ahamo, povo, and LINEMO are fully online services for tech-comfortable users. UQ mobile and Y!mobile maintain partial physical store support, better for users who want in-person help. UQ and Y!mobile also offer family and home bundle discounts.
Can I keep my existing smartphone when switching to a sub-brand?
In most cases, yes. Unlocked phones or phones from the same carrier group work without modification. Devices purchased in Japan after 2021 are sold SIM-unlocked by default, so this is rarely an obstacle.