“Can Rakuten Mobile actually be used properly in Osaka?”
Honestly, this question comes up quite often.
Osaka is known for Universal Studios Japan, takoyaki, and its “okini” culture. There are a lot of people, so it’s natural to be concerned about signal quality.
To give the conclusion first:
In Osaka city and major areas, there are almost no issues. It works perfectly fine.
However, there are some points to note depending on the environment.
This time, we verified whether it can be used in real situations based on Rakuten Mobile’s official area data.

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■ Verification Method
In this article, we used the following official tool:
👉 https://network.mobile.rakuten.co.jp/area/connectivity-fitting/
• Checked pinpoint locations by area
• Evaluated mainly outdoor environments
• Evaluation criteria: AAA (Very good) ~
※ This is based on official database data, not assumptions

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■ Conclusion: Osaka is a “perfectly usable area”
Here are the results for major areas:

Area | Evaluation
USJ | ○
Shin-Osaka | ○
Nishinari | ○
Umeda | ○

👉 Conclusion: All major areas are at a practical level
Saying “weak signal in Osaka” is honestly at a level where people would question it.

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■ Area-by-area Check

● USJ (Universal Studios Japan)
The center of tourism and leisure.
• Signal: No issues
• During congestion: Some speed drops may occur
👉 Being “out of coverage at USJ” is almost unrealistic
Photos, SNS, and videos can be used normally

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● Shin-Osaka (Shinkansen & business hub)
An area with high business usage.
• Signal: Stable
• Indoors: Slight caution (deep inside stations, etc.)
👉 Minimal stress even while moving
No issues for business use

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● Umeda (Center of Osaka)
The most densely populated area.
• Signal: Good
• Underground: Slight caution
👉 No issues above ground
Weak signals in underground malls are common across all carriers

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● Nishinari Area
An area many people are honestly concerned about.
• Signal: No issues
👉 Also works normally here
The difference between areas seems largely reduced

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■ The Reality of Improvements Seen from Base Station Data
Rakuten Mobile is still expanding its coverage.

▼ Recent base station installations (Osaka Prefecture)
• Suminoe Ward (March 10, 2026)
• Naniwa Ward (March 13, 2026)
• Kashiwara City (March 11, 2026)
• Sennan City (March 6, 2026)
• Hannan City (March 12, 2026)
• Takatsuki City (March 13, 2026)

👉 Key point here
“Improvements are still happening in real time”

In other words,
The past image of “weak signal” is already outdated.

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■ Points to Note

① Underground / indoors
• Umeda underground malls
• Deep inside buildings
👉 This applies to all carriers, not just Rakuten

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② During congestion
• USJ
• Large events
👉 Temporary slowdowns may occur
However, it rarely becomes unusable

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■ Recommended Usage

● OK as a main line
• No issues in central Osaka

● If concerned, use dual SIM
• Rakuten (main) + sub line
👉 Reduce cost while mitigating risk

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■ Conclusion
Can Rakuten Mobile be used in Osaka?

👉 Conclusion: Yes, it works perfectly fine. More than sufficient.

• USJ → No issues
• Umeda → No issues (underground caution)
• Shin-Osaka → No issues
• Nishinari → No issues

Above all,
The coverage is still expanding and improving.

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■ Finally
“Rakuten Mobile = unstable signal”

If you’re avoiding it just because of that image,
that’s honestly a waste.

• One of the lowest prices in the industry
• Unlimited data
• Earn Rakuten points

👉 Outstanding cost performance

If you plan to use it in Osaka,
it’s definitely worth trying once and deciding for yourself.

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