Complete Guide to Japanese and Korean Number Generation: Overview of Number Generation and Message Channel Suitability for Japan and Korea Markets (2025)

Expanding into the Japanese and Korean markets, number generation is the first step to reaching users. However, the communication ecosystems in these two markets differ significantly: iMessage penetration is extremely high in Japan, KakaoTalk dominates in Korea while Telegram is active in cross-border communities, and generic number generation solutions often overlook these local characteristics, resulting in a large number of low-quality numbers. This article delves into the core strategies for generating Japanese and Korean numbers, matches them with mainstream messaging channels (Telegram, WhatsApp, iMessage, RCS), and provides actionable best practices to help you build an efficient “generate → filter → export” pipeline.

Why Do the Japanese and Korean Markets Need Specialized Number Generation Strategies?

Although Japan and South Korea are geographically adjacent, their mobile communication landscapes are completely different. Generic number generation solutions typically only consider the existence of number prefixes while overlooking the following key differences:

iMessage’s Dominance in Japan: Japan’s iPhone market share exceeds 65%, and iMessage is tied to Apple IDs with extremely high activity. Generic generation solutions may ignore the impact of carrier-native prefixes (e.g., docomo 090/080) on iMessage registration pass rates.
KakaoTalk Dominance but Telegram Activity in Korea: KakaoTalk is the national app, but Telegram is frequently used in airdrop groups and crypto communities. WhatsApp usage in Korea is almost negligible. If you rely solely on WhatsApp number filtering, you’re likely wasting your budget.
Frequent Changes in Prefix Rules: Japan’s old prefixes (090/080) and new MVNO prefixes (050) have vastly different activity levels; Korea’s old prefixes such as 011/016 have largely been decommissioned. Tailoring prefix selection by country can significantly increase the proportion of valid numbers.

Therefore, number generation for Japan and Korea must combine local prefix knowledge, channel prioritization, and balance consumption efficiency, rather than using a one-size-fits-all global random generation approach.

Analysis of Number Generation and Message Channel Matching in Japan

Comparison of Mainstream Message Channels in Japan

Channel	Installation Penetration	Activity Level	Value for Filtering	Recommended Priority
iMessage	High (default on iOS)	Extremely High	Suitable for precisely targeting users with registered Apple IDs	★★★★★
Telegram	Medium (young users, crypto communities)	Medium-High	Suitable for community management and airdrop campaigns	★★★★
WhatsApp	Low (minor enterprise communication)	Low	Only for cross-border scenarios	★★
RCS	Medium (carrier-driven)	Medium	Suitable for verifying if a number is active	★★★

Channel Priority Recommendation for Japan: iMessage > Telegram > RCS > WhatsApp. Given the extremely low usage of WhatsApp in Japan, it is recommended to focus core investment on iMessage and Telegram channels.

Key Parameters and Practical Tips for Japanese Number Generation

Prefix Selection: Prioritize native prefixes from Japan’s three major carriers:
- docomo: 090-xxxx, 080-xxxx (especially older prefixes)
- au: 080-xxxx, 090-xxxx (some prefixes shared with new carriers)
- SoftBank: 090-xxxx, 080-xxxx, 070-xxxx
- MVNO prefixes (050) have lower pass rates on iMessage and RCS; use with caution.
Regional Activation Rate Differences: iMessage registration pass rates for prefixes in major metropolitan areas such as Tokyo, Osaka, and Nagoya are 20%–30% higher than in rural areas. When generating, consider weighting prefixes by region.
Avoid Disconnected/Recycled Prefixes: Japanese carriers recycle and reallocate numbers that have been inactive for a long time. New prefixes (e.g., some 070 numbers) may be assigned to new users but have unstable historical activity. It is recommended to pre-filter using the “activation detection” feature in the console’s number filtering tool.

Prefix Activity Tip

When generating Japanese numbers, prioritize older docomo and au prefixes (e.g., 090-xxxx), as their registration pass rates on iMessage and RCS channels are significantly higher than those of newer prefixes. For specific prefix activity data, please refer to the real-time results in the console.

Analysis of Number Generation and Message Channel Matching in Korea

Comparison of Mainstream Message Channels in Korea

Channel	Installation Penetration	Activity Level	Value for Filtering	Recommended Priority
Telegram	Medium (cross-border communities, airdrop groups)	High	Suitable for overseas customer acquisition and crypto promotion	★★★★★
iMessage	Medium (iPhone users)	Medium	Can assist in verifying Apple users	★★★★
WhatsApp	Extremely Low	Extremely Low	Not recommended for standalone use	★
RCS	Low (slow carrier promotion)	Low	Can serve as a supplementary empty number check	★★
KakaoTalk	Extremely High (monopoly)	Extremely High	However, few filtering tools support its ID detection	—

Channel Priority Recommendation for Korea: Telegram > iMessage > RCS > WhatsApp. Although KakaoTalk is the king, currently mainstream filtering platforms do not support its ID detection, so it is not included in the filtering list for now.

Key Parameters and Practical Tips for Korean Number Generation

Prefix Selection: Korea’s 010 prefix is absolutely mainstream (about 90% of users). Carrier distribution:
- SK Telecom: 010-xxxx-yyyy
- KT: 010-xxxx-yyyy
- LGU+: 010-xxxx-yyyy
- MVNOs: share the 010 prefix, distinguishable by sub-prefixes
Avoid Old Prefixes: Old prefixes such as 011/016/017/018/019 have been largely retired. Even if they exist, they are mostly retained by long-time users with extremely low activity. It is not recommended to generate them.
Prioritize Densely Populated Areas: Prefixes from regions like Seoul, Gyeonggi-do, and Incheon show higher activity in Telegram and iMessage detection. You can combine area codes (e.g., 02 for Seoul) to filter prefixes.

Comparison of Dedicated Japanese/Korean Number Generation vs. Generic Generation Solutions

Dimension	Dedicated Japanese/Korean Generation	Generic Generation Solution
Channel Matching	Filters by country for Telegram/iMessage/RCS with preset high priority	May run across all channels, wasting detection on many invalid numbers
Active Number Ratio	Typically 30%–60% (based on actual detection)	Likely below 20%
Balance Consumption Efficiency	High, detection focused on high-potential channels	Low, wasted on low-activity channels
Export Format Flexibility	Supports CSV/TXT and can organize results by filter status into subfolders	Mostly offers only a single format

Conclusion: Dedicated Japanese/Korean generation significantly outperforms generic solutions in average valid number rates, resulting in lower overall filtering costs. However, actual figures vary depending on prefix and channel combinations. Please refer to the real-time pricing on each platform’s official website or console.

Different Billing Reminders

Different filtering platforms may charge different unit prices for Japanese and Korean numbers; some platforms price by country or channel tier. Before submitting a formal task, select the target country/channel in the console and check the estimated cost to avoid budget discrepancies.

Practical Workflow and Best Practices for Japanese and Korean Number Generation

It is recommended to follow a 4-step pipeline as described below:

Select Country and Prefix Strategy
- Japan: Use prefixes 090/080/070, generate by carrier group or weighted by region.
- Korea: Uniformly use the 010 prefix, optionally specify carriers SKT/KT/LGU+.
- Methods: Generate by fixed prefix, random generation (following prefix rules), or import an existing number list via CSV.
Specify Filter Channels
- Japan: Preferentially generate numbers and perform iMessage activation detection first, then filter Telegram activity (7/15/30 days).
- Korea: Directly filter Telegram activity, supplemented by iMessage and RCS verification.
- Recommendation: Limit channels to 2–3 per task to avoid excessive balance dispersion.
Submit Task and Confirm Balance
- After entering the estimated number of numbers in the console, the system will display the estimated cost. If the balance is insufficient, recharge first (USDT TRC20 minimum approximately 50 USDT).
- Enable task completion notifications to export results in a timely manner.
Export Results and Remove Duplicates
- Export as CSV/TXT and filter by fields such as “Valid/Invalid/Gender.”
- Use the platform’s data deduplication repository to avoid re-checking the same number, saving costs.

Frequently Asked Questions (FAQ)

Q: Does Japanese/Korean number generation support detecting Telegram activity and gender?
A: Yes. In KK-DATA or similar platforms, after generating Japanese/Korean numbers, you can select “Telegram Activity Detection” (supports 7/15/30-day windows) and “Telegram Gender Identification” (avatar analysis) to help distinguish the activity cycle and gender distribution of target users.

Q: Can generated Japanese numbers be directly used for iMessage verification?
A: Yes, but it is recommended to prioritize native carrier prefixes (e.g., docomo 090/080). MVNO prefixes may have lower iMessage registration pass rates. The actual result depends on the status returned after detection.

Q: Can generated Korean numbers detect empty numbers and carriers?
A: Some platforms (e.g., KK-DATA) support both empty number identification and carrier attribution analysis through RCS detection, which can be used to filter invalid numbers. Please refer to the capabilities available on the console for specific support.

Q: What is the recommended monthly budget and recharge threshold for Japanese/Korean number generation?
A: This depends on your target filtering scale and channel combination. We suggest starting with a small test (e.g., 10,000 numbers) to estimate unit price and validity rate, then plan bulk recharge. USDT (TRC20) recharge minimum is approximately 50 USDT, with no subscription plan commitment.

Q: How do platforms like 007data, thdata, and KK-DATA differ in Japanese/Korean number generation?
A: Different platforms have varying strengths in prefix coverage rules, number of detection channels, export format flexibility, and interface complexity. KK-DATA supports number generation for 240+ countries, cross-platform filtering of up to 1 million numbers per task, a data deduplication repository, and a flexible pay-per-number billing model. For specific features and pricing, please refer to each platform’s official website and console. We recommend trying the free generation feature based on your needs before making a decision.

Take Action: Experience free global number generation → Visit Official Site
Log in to the console and submit Japanese/Korean filtering tasks → app.kkdata.cc
View real-time unit prices → Billing Information
Get Japanese/Korean market number filtering strategy advice → Contact @kkdata_cc

Complete Guide to Phone Number Generation for Japan and South Korea: Overview of Number Generation and Message Channel Suitability for the Japanese and Korean Markets (2025)

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